Abstract: In cycling activities, riders often encounter rough terrain having various obstacles such as rocks, mounds, tree roots, and branches. These obstacles subject the bicycle's crankset and chain to extremes in stress, loading, and impact. An improved bash guard may be attached to the bicycle to protect against damage. The bash guard may include at least one rotator operatively secured to a crankset or a crank arm on the bicycle. The rotator(s) may be configured to rotate independent of the crankset rotation. The independent rotation of the rotator(s) may permit the bash guard to roll over obstacles, significantly reducing frictional sliding or rubbing between an edge of the bash guard and the obstacles.

Abstract: A device for protecting the derailleur of a bicycle which includes a shield member attached to a clamp member wherein the shield member covers and protects the derailleur of the bicycle and the clamp member is attached to the frame of a bicycle.

Abstract: A belt-driven transmission having an endless torque-transmitting member that is operatively connected with two power transmitting elements. The transmission includes at least one guide rail assembly that engages the endless torque-transmitting member with free play and that has an outer guide rail and an inner guide rail so that the endless torque-transmitting member runs within a guide rail channel defined by the outer and inner guide rails of the guide rail assembly. The endless torque-transmitting member includes one surface that is at least partially provided with outwardly-extending tabs and another, tab-free surface. The guide rail assembly is pressed against the endless torque-transmitting member on the tab-free surface to limit vibratory amplitude of the endless torque-transmitting member during operation of the transmission.

Abstract: A bicycle chain wheel assembly is provided with a chain wheel and a chain wheel cover. The chain wheel has a central mounting portion and an outer gear with a plurality of outer gear teeth. The chain wheel cover is disposed on an exteriorly facing side of the chain wheel. The chain wheel cover has a mounting portion coupled to the chain wheel and an outer peripheral portion with a chain drop prevention protrusion projecting outwardly from the outer peripheral portion at a location that is radially inward of the outer gear teeth.

Abstract: Disclosed herein is a pulley cover assembly for a motorcycle transmission which can securely support a pulley to minimize an shivering phenomenon thereof caused when a load is applied to the rotating pulley, thereby attenuating noise due to the shivering phenomenon and improving a rotational performance of the pulley. Further, the pulley cover assembly can ensure convenient clutch operation through the use of a hydraulic clutch operating mechanism. The clutch operating mechanism includes a hydraulic casing integrally formed at the pulley cover and having a hydraulic oil inlet passage and a hydraulic oil outlet passage, and a piston disposed inside the hydraulic casing while being fixed to an end of the clutch rod of the motorcycle transmission. Such a clutch operating mechanism is adapted to supply hydraulic power into the hydraulic casing to permit the piston to linearly move the clutch rod by a predetermined distance.

Abstract: An inner ATV sprocket guard that is larger in diameter then the sprocket and mounts to the same rotating assembly as the sprocket and mounts close to the chain providing additional protection for the sprocket and aids in guiding the chain onto the sprocket.

Abstract: A device for detecting the speed of an endless torque-transmitting member that passes around a pair of spaced conical pulley pairs of a continuously variable transmission. The device includes a sensor that is positioned adjacent the endless torque-transmitting member and that detects the speed of the endless torque-transmitting member at a point that is located relative to the movement course of the endless torque-transmitting member that is independent of the rotational speed relationship of the pulley pairs.

Abstract: A continuously variable transmission (CVT) includes an aluminum housing member having a bore formed therein. A rotatable pulley member is supported on a bearing within the bore. The bore includes a layer of thermal spray coating for improved wear resistance so that the bore supports the bearing without a steel sleeve therebetween.

Abstract: An internal combustion engine has a power unit case having a crankcase, a first housing flange and a second housing flange. The crankshaft axis and the output shaft axis define a reference plane. An oil pump has an oil pump shaft, having an oil pump shaft axis, disposed at least partially in an oil pump chamber. A normal projection of the oil pump shaft axis onto the reference plane is located between the crankshaft axis and the output shaft axis. A first housing cover is mounted to the first housing flange on a first side of the power unit case. A separate oil pump cover is mounted to the second housing flange on the first side of the power unit case to close the oil pump chamber.

Abstract: An engine having an engine case on one side of which a V-belt type of continuously variable transmission is provided, the CVT being placed in a transmission case and constituted that a V-belt is routed around a drive pulley and a driven pulley, the drive pulley being attached to one end of a crankshaft, the driven pulley being attached to one end of a transmission shaft parallel to the crankshaft, characterized in that the crankshaft is supported for free rotation with the engine case, one end of the crankshaft is projected in cantilever fashion from the engine case into the transmission case, the drive pulley is attached to the projected portion, and the transmission case is made as a component separate from or independent of the engine case and supported with the engine case so that a space is present between the engine case and the transmission case.

Abstract: A crank shaft power takeoff system, including an appliance intended for use in connection with lawns and/or gardens, the appliance including an engine that includes a crank shaft, the system further including an accessory used in conjunction with the appliance, and a transmission for utilizing the crank shaft of the appliance engine to operate the accessory.

Abstract: A case cover for a continuously variable transmission includes a wall having a plurality of fastening elements thereon and at which a sheave assembly is rotatably mountable. The wall forms at least a portion of a cavity for containing at least a portion of the sheave assembly. Two surfaces define a slot that is configured to position and positively locate a portion of the bearing retainer to result in coarse alignment of bearing retainer fastening elements with the case cover fastening elements. The bearing retainer fastening elements are preferably protruding nuts, and the case cover fastening elements are preferably tapered holes configured to further align the nuts for engagement with threaded fasteners.

Abstract: A drive belt cooling structure for an offroad vehicle including an internal combustion engine. The engine has at least one cylinder, a piston positioned in the cylinder, and a crankshaft. The transmission includes a transmission chamber defined by a transmission case. A primary shaft of the transmission is driven by the crankshaft. A main shaft of the transmission is offset from the primary shaft and is driven by the primary shaft through a drive belt. The main shaft is arranged to drive at least one of the wheels. The primary shaft is supported by a support bracket, the support bracket being connected to the crankcase. An air inlet is adapted to permit entry of cooling air into the transmission chamber, and an air guide is configured to direct a flow of cooling air into the transmission chamber along the drive belt, the air guide being connected to the support bracket.

Abstract: A transfer guide for a high-speed power transmission, which can cancel a change in a transmission chain speed so that smooth transmission timing can be realized and a driving power and vibration noises of the transmission chain can be significantly reduced. A curve track T for a transfer guide 100 for a high-speed power transmission disposed in a transfer position X2 just before a transmission chain, which is traveled at a fixed speed by pressing the chain on the inner circumferential side of the chain with a travel limiting guide R, is meshed with a sprocket S, is defined along an movement passage of the roller C2 in the transfer position X2. Thus, the change in the transmission chain speed is canceled so that smooth transmission timing can be reliably realized and the driving power and vibration noise of the transmission chain can be significantly reduced.

Abstract: A bicycle derailleur is provided with a chain guide that basically includes inner and outer guide plates, a guide pulley and a tension pulley. The tension pulley is rotatable about a rotation axis between free ends of the guide plates. The tension pulley has an annular recess disposed about the rotation axis to form a projection. The inner guide plate has a guide section with a radially outermost edge. Preferably, the outermost edge of the guide section is located in the annular recess, and the projection projects axially further from a center plane of the tension pulley than the outermost edge. Preferably, the chain guide includes a dust cap coupled between the inner guide plate and the tension pulley. Preferably, the outermost edge of the guide section is located radially inwardly of the projection and radially outwardly of the annular portion of the dust cap.

Abstract: A pulley holder for rotatably supporting a pulley around which a belt is wound, in which the pulley holder includes a shaft having a shaft body for supporting the pulley and a projection at least one end of the shaft body in its axial direction, and a holder body having a bearing for supporting the shaft body, and a fitting part for fitting the projection. Since the projection is biased from an axis of the shaft body, once the projection is fit into the fitting part, the shaft body would not rotate around the axis. Accordingly, a friction wear of the bearing of the holder body is prevented and thus a shift in conveying a carriage is prevented.

Abstract: The tracked drive device particularly protected by its frame or hood as well as by protective plates, so as to prevent any accidental insertion of a finger or any other part of the human body between the track elements. The arrangement makes access to the track, for replacement or maintenance, particularly difficult. The invention provides a pivoting construction of the driving device, whereby the driving mechanisms become easily accessible, thus facilitating track change.

Abstract: A bicycle rear derailleur guard assembly for use with a bicycle having a derailleur mounted to a frame of the bicycle by a derailleur mounting bolt. The derailleur guard assembly preferably includes a body supportable by an axle assembly of the bicycle. The body is configured to extend from an axis of the axle assembly to a space adjacent the mounting bolt of the derailleur and defines an inner surface facing the frame when the guard assembly is mounted to the bicycle. A support is configured to support the derailleur when the guard assembly is mounted to the bicycle and, in at least one arrangement, the body is positioned outwardly of the derailleur mounting bolt within the space adjacent the mounting bolt.

Abstract: A saddle-type vehicle has an engine unit with a continuously variable transmission. The transmission has a primary sheave and a secondary sheave that are connected by a flexible transmitter such as a belt. The primary sheave, the secondary sheave and the belt are positioned in a transmission case. A starting kick shaft is positioned on the same side of the engine unit as the transmission case but the starting kick shaft is positioned outside of a profile of the transmission case when the engine unit is viewed from a lateral side.

Abstract: A skid steer vehicle has two drive motors that are connected by belts to spring-mounted front and rear wheels.

Abstract: The present invention provides a chain alignment mechanism of a transmission for a bicycle which includes a drive sprocket wheel which is rotatably driven by a crankshaft, a driven sprocket wheel which is drivably connected with an output shaft which is rotated in an interlocking manner with a drive wheel of the bicycle, and an endless chain which is wound around the above-mentioned drive sprocket wheel and the above-mentioned driven sprocket wheel, wherein even when the chain of the transmission for the bicycle is deflected or slackened due to a driving manipulation of the bicycle, the vertical vibration of the bicycle or the like, the chain is reeled in the drive sprocket wheel in a row in an aligning manner. A chain guide member is arranged on an endless-chain-reel-in side of the above-mentioned drive sprocket wheel.

Abstract: A rotary cutter assembly (11) includes a rotary cutter (74) rotated by a motor (76) through a drive including pulleys (250, 264) and a belt (326) inside of a combination guard and belt tensioner assembly (260). The rotary cutter (74) includes a cutter head (82) having integral blade holders (92) which slideably receive knives (90) in a channel (230) each having a detent (236) which is received in an aperture (91) in the knife (90) so that no fasteners or moveable parts are provided for holding the knives (90) and adjustment of the knives (90) is not needed or allowed. Guard quarters (266, 314) and a guard half (268) are moveable between closed and open positions and are held in the closed position by a single latch (325). The guard half (268) includes an idler (300) which tensions the belt (326) in the closed position.

Abstract: A chain ring protector having a substantially planar mounting bracket operably secured to the bottom bracket sleeve of a vehicle with a durable semi-circumferential guard extending therefrom is disclosed. The durable guard has a substantially arcuate outer edge sized to approximate the outer diameter of a chain ring, and it is operably secured to the planar mounting bracket such that the outer edge extends slightly beyond the outer diameter of the portion of the chain ring extending below the bottom bracket sleeve.

Abstract: A rear derailleur guard for mounting onto a bicycle with an axle, a wheel, a horizontal frame member, a vertical frame member and a rear derailleur. The guard has a main region with an apex, a horizontal member that extends forwardly from the main region and contains a semi-circular horizontal clip, a vertical member that extends upwardly from the main region and contains a semi-circular vertical clip and a lower shield that extends downwardly and forwardly from the main region. When the guard is mounted, the horizontal clip attaches to the horizontal frame member and the vertical clip attaches to the vertical frame member. The axle protrudes between the horizontal member and the vertical member adjacent to the apex. The lower shield has an inside edge, an outside edge and exterior and interior surfaces extending therebetween. The outside edge curves such that it is perpendicular to the interior surface.

Abstract: An actuator comprises a driving force-transmitting mechanism which includes a belt member running over a driving pulley and a driven pulley, and a guide mechanism which includes a plurality of balls which rolls along first ball-rolling grooves formed on a frame, and second ball-rolling grooves formed on a slider. The guide mechanism guides the slider when the slider is displaced along the frame.

Abstract: A bicycle rear derailleur is basically provided with a base member, a link mechanism, outer and inner plate members, a guide pulley and a tension pulley. At least one of the outer and inner plate members includes a bent portion integrally formed with the at least one of the outer and inner plate members to prevent a chain from disengaging from at least one of the tension pulley and the guide pulley. The bent portion is formed by bending an inner section of the at least one of outer and inner plate members in a direction towards the other of the at least one of the outer and inner plate members. The inner section is spaced inwardly from an external peripheral edge of the at least one of the outer and inner plate members.

Abstract: A guide channel for energy guiding chains which can be mounted on a base structure, has parallel, lateral guide elements extending in the longitudinal direction of the guide channel, between which an energy guiding chain can rest and bottom guide elements, on which the lower strand of an energy guide chain can rest.

Abstract: A belt transmission system of a snowmobile includes a cover which has an upper cover portion and a side cover portion. The cover is pivotally mounted to the chassis of the snowmobile so that it can not only be conveniently installed or removed, but can also be pivotally opened to allow for access to the belt transmission system. The cover effectively prevents injury when the hood and side panel of fairings of the snowmobile are open. The cover further includes noise absorption material attached thereto. Thus, noise reduction is improved by better confining the noise produced by engagement of the belt with the pulleys within an inner space, and by partially absorbing the noise energy.

Abstract: A bicycle rear derailleur guard assembly for use with a bicycle having a derailleur mounted to a frame of the bicycle by a derailleur mounting bolt. The derailleur guard assembly preferably includes a body supportable by an axle assembly of the bicycle. The body is configured to extend from an axis of the axle assembly to a space adjacent the mounting bolt of the derailleur and defines an inner surface facing the frame when the guard assembly is mounted to the bicycle. A support is configured to support the derailleur when the guard assembly is mounted to the bicycle and, in at least one arrangement, the body is positioned outwardly of the derailleur mounting bolt within the space adjacent the mounting bolt.

Abstract: In a V-belt type transmission having a V-belt entrained on a pulley, the pulley includes a fixed pulley half fixed to an end portion of a crankshaft and a movable pulley half supported on the crankshaft but axially slidable in opposition to the fixed pulley half. The fixed pulley half is secured with a bolt that is threaded and engaged with a female screw formed inside an end portion of the crankshaft. The V-belt type transmission is capable of securely clamping a fixed pulley half and is capable of preventing the entry of dust and water into a fixed pulley half threaded portion formed in an end portion of the crankshaft. This arrangement protects against the formation of rust and corrosion.

Abstract: A drive assembly for a closed loop cable system in which a flexible driver member drives a door or the like back and forth has the flexible drive member wrapped around and driven by a drive pulley. The drive assembly includes a motor unit having a motor shaft that rotates about a drive axis for rotating the drive pulley about a pulley axis, and a tensioning mechanism for adjusting the position of the pulley axis with respect to the drive axis responsive to tension in the flexible drive member.

Abstract: An engine having an engine case on one side of which a V-belt type of continuously variable transmission is provided, the CVT being placed in a transmission case and constituted that a V-belt is routed around a drive pulley and a driven pulley, the drive pulley being attached to one end of a crankshaft, the driven pulley being attached to one end of a transmission shaft parallel to the crankshaft, characterized in that

Abstract: A continuously variable transmission comprises a driving pulley (11), a driven pulley (21), an endless dry-type belt (15) wound around both pulleys, a tension-adjusting device (50) arranged between the driving and driven pulleys for pressing the slack side of the belt to generate belt tension, stroke mechanisms (14, 22) provided on the driving and driven pulleys respectively for axially shifting the movable sheaves depending on inputted rotational force, a ratio-changing motor (40), and a gear mechanism for transmitting the rotational force generated by the motor to both stroke mechanisms as well as for mechanically connecting both stroke mechanisms in such a way that the movable sheaves of both pulleys can be shifted synchronously and axially oppositely in relation to the fixed sheaves. With this arrangement, the belt is prevented from slipping, the transmission ratio can be controlled precisely and stably, and the shift-response of this transmission can be improved.

Abstract: The invention relates to a tensioning device for use in vehicle power steering assembly, in particular, having a drive unit for rotating an input pulley rotatably connected to an output pulley via a flexible belt. The tensioning device includes a housing and an arm movably attached relative to the housing. A contact device is mounted on the arm and is adapted to be engaged with a portion of the belt between the input and output pulleys. The arm is movable relative to the belt to position the contact device against the belt to provide tension on the belt.

Abstract: A chain and sprocket transmission system for small all-terrain vehicles couples a high-speed, low-horsepower motor to a small diameter ground-engaging vehicle driving wheel. The chain and sprocket transmission system includes a small driving sprocket directly driven by the high-speed, low-horsepower motor. A large driven sprocket coaxially rotates with the small-diameter ground-engaging wheel. An endless chain has links for encircling in a loop the small driving sprocket and the large driven sprocket for powering the small-diameter ground-engaging wheel. A chain keeper pivots over the small driving sprocket. This chain keeper has a chain-contacting tongue elastically biased with respect to the keeper toward the inside of the chain loop. The chain-contacting tongue contacts and tensions the chain at the idle chain linkage between the small driving sprocket and the large driven sprocket.

Abstract: A continuously variable transmission (CVT) assembly includes first and second pulley pairs having a drive belt extended therebetween. A transmission case cover includes a threaded aperture. A threaded sleeve and bearing assembly is positioned on a stationary pulley member and threadedly engaged with the threaded aperture. The threaded sleeve and bearing assembly is engaged with the stationary pulley member such that rotation of the threaded sleeve and bearing assembly causes axial adjustment of the stationary pulley member. A lock feature locks the threaded sleeve and bearing assembly in the desired rotational position, thereby locking the stationary pulley member in an axially adjusted position.

Abstract: The present invention relates to a preassembled drive means unit provided with a support body comprising at least one wheel receiver, which is adapted to receive therein a respective drive means wheel, and an endless drive means, which is adapted to be put around said drive means wheels. This drive means unit comprises a replaceable mounting aid which is arranged in the area of the wheel receiver instead of a drive means wheel. One or a plurality of the drive means wheels can be replaced by the mounting aid. The whole preassembled drive means unit is held in position by the mounting aid, although on or a plurality of the drive means wheels of the drive means unit are not installed. In this way, it will be more easily possible to assemble the drive means unit and to attach the drive means wheels.

Abstract: A motorcycle has a final drive, including a flexible drive member, such as a chain or a belt, that extends between the drive pulley and the driven pulley. A belt retention member is positioned proximate a forward portion of the final drive to reduce the likelihood of the belt skipping free of the drive pulley. The belt retention member preferably includes an upper belt retention portion and a lower belt retention portion. Preferably, the upper drive retention portion is positioned further forward relative to the lower belt retention portion such that the upper portion is moved more forward relative to an axis of rotation of the pulley. In this manner, the belt retention member allows more slack to be thrown during rapid acceleration from a decelerated state in the illustrated motorcycle.

Abstract: A transfer case housing includes a single-piece casing forming an interior compartment provided with an access opening for assembling components of the transfer case, and a casing cover member for closing the access opening. The casing is manufactured as a single-piece casting wherein bearing bores could be machined into the unitary single-piece casing. The interior compartment is adapted to house an appropriate torque transfer mechanism, such as constant four-wheel-drive, or “on-demand” four-wheel-drive, providing rear or front wheel drive (two-wheel-drive mode), or four wheel drive (four-wheel-drive mode), controlled automatically or manually by a vehicle operator.

Abstract: A work bench includes a frame, a bench surface on the frame with the bench surface including at least two members, one of which is movable along the frame for clamping a workpiece between the members. A mechanism for moving the member includes two screws coupled with the members. The two screws are spaced with the member for moving the member upon rotation of the screws. A sprocket is coupled with each of the screws. A transmission belt or chain is coupled with the sprockets. At least one handle is coupled with one of the screws to rotate the screws. At least one clutch is coupled with the at least one screw to limit clamping pressure on the workpiece. The clutch enables rotation of one screw with respect to the other screw so that workpieces may be clamped between the members and clamping of the workpiece may be accomplished by rotation of the screws with one hand of the operator. Also, a guard may be present which covers the transmission belt or chain.

Abstract: A chain casing of a bicycle includes an intermediate hollow body that extends between a chain ring and a sprocket. The hollow body has a peripheral wall defining a receiving space. First and second partitions extend in the receiving space to divide the same into upper and lower compartments that receive the upper and lower chain sections of a chain extending between the chain ring and the sprocket. A tension roller is disposed between a front end of the hollow body and the chain ring below the lower chain section, which is in sliding contact with and straddles the tensioning roller.

Abstract: An actuator comprises a driving force-transmitting mechanism which includes a belt member running over a driving pulley and a driven pulley, and a guide mechanism which includes a plurality of balls which rolls along first ball-rolling grooves formed on a frame, and second ball-rolling grooves formed on a slider. The guide mechanism guides the slider when the slider is displaced along the frame.

Abstract: An automatic cooling mechanism is provided for an electrical device having a high-temperature element and a rolling shaft. The mechanism includes a fan mounted within the electrical device and a transmission mechanism connected between the fan and the rolling shaft for transmitting rotational kinetic energy from the rolling shaft to the fan to rotate the fan for reducing the temperature of the high-temperature element.

Abstract: The invention relates to a guide bar for a motor-driven chain saw comprising an elongated planar base body which has a guide groove (8) in its outer periphery for guiding a saw chain (6). The saw chain (6) includes cutting links (14), lateral connecting links (12) and center drive links (10). The links are pivotally connected to each other with rivets (18). The drive links (10) engage with rakers (11) in the guide groove (8); whereas, the connecting links (12) are supported on guide surfaces (9) provided laterally of the guide groove (8). The guide bar (3) is fixed to the housing (2) of the motor-driven chain saw (1) at its attachment end (4) and the free tip (22) of the guide bar (3) has a direction-changing section (21) for the saw chain (6). In the region of the direction-changing section (21), guide plates (23, 43) are attached to the guide bar (3).

Abstract: A variable speed drive comprising two drives, an output drive wheel and an endless, extendible member that is driven by the drives and extends around and rotates the output drive wheel. The drives are operable to move the endless member around an endless path at a first speed at a first driving position and at a second speed at a second position. This causes local expansion or contraction of the endless member around the output drive wheel and so varies its speed.

Abstract: A belt type transmission improves the durability of a support portion of a driven shaft by reducing a load acting on a driven shaft, and improves the durability of the belt and reduces noise by suppressing vibration of a driven pulley. The belt type transmission includes a driven pulley having a fixed pulley piece and a movable pulley piece fitted to a driven shaft. The fixed pulley piece is rotatably supported, respectively, on the driven shaft and a bearing holder, being a constructional element of a transmission case. The bearing holder has a size overlapping only the driven pulley, and is coupled to a left case, which is a constructional element of the transmission case, in the vicinity of the driven pulley. As a result, the rigidity for supporting the fixed pulley piece on the driven side can be increased, thereby enabling suppression of vibration by the driven pulley.

Abstract: A bicycle includes a conventional pedal crank and chain drive together with a conventional derailleur shifting mechanism operative to selectively transfer the drive chain between alternative rear sprockets of the bicycle drive system. A chain ring is rotatable in response to pedal crank rotation to transfer pedal crank power to the rear sprockets. A pair of guide blocks define respective internal guide channels through which the drive chain passes toward and from engagement with the chain ring. The guide blocks are maintained at their respective positions by a guide support plate secured to the bicycle frame.

Abstract: In a power transmission device of an engine, an opening 37 is formed in a gear case 36 to allow an output shaft 11 to be pulled out of the gear case 36 from one end of the output shaft 11 toward the other end thereof. A lid member 33 is removably attached to the gear case 36 such that it covers the opening 37. The first support member 13 is removably attached to the gear case 36 for rotatably supporting the output shaft 11. A first shim 15 is interposed between the first support member 13 and the gear case 36. A second support member 23 is removably attached to the gear case 36 for rotatably supporting the drive shaft 21. A second shim 25 is interposed between the second support member 23 and the gear case 36.

Abstract: A guide channel for energy guiding chains, which can be mounted on a base structure, has parallel, lateral guide elements extending in the longitudinal direction of the guide channel, between which an energy guiding chain can rest, and bottom guide elements, on which the lower strand of the energy guiding chain can rest. In order to simplify manufacture and assembly, as well as to reduce the transport volume, of a guide channel of this kind, the lateral and/or bottom guide elements are designed as profile rods (2, 3), and mounting elements (4), which can be mounted on the base structure, are provided, on which the profile rods (2, 3) can be mounted in such a way that they have a section (9) protruding into the inside of the guide channel (1), by means of which the energy guiding chain can be laterally guided and on which the lower strand can rest.

Abstract: An all terrain vehicle comprises an engine that powers a chain or belt operated final drive. The final drive comprises an drive sprocket and a driven sprocket. The driven sprocket is capable of pivotal movement relative to the engine. In one arrangement, the driven sprocket is mounted to a rear portion of a swing arm. The swing arm is pivotally mounted to a frame assembly of the vehicle. A guide member is mounted to the swing arm and is pivotally mounted to the frame assembly. The guide member is laterally displaced from bearings used to journal the swing arm for pivotal movement.