Abstract: An adjustable cam shaft includes an elongated shaft which may include multiple shaft sections rotatably coupled to one another. Intake and exhaust cam lobes are carried by the one or more shafts and are selectively rotatable relative to one another and selectively locked in place relative to one another in order to adjust a displacement angle between the cam lobes to alter intake and exhaust timing and other engine characteristics without the need to replace the cam shaft.

Abstract: An adjustable cam shaft includes an elongated shaft which may include multiple shaft sections rotatably coupled to one another. Intake and exhaust cam lobes are carried by the one or more shafts and are selectively rotatable relative to one another and selectively locked in place relative to one another in order to adjust a displacement angle between the cam lobes to alter intake and exhaust timing and other engine characteristics without the need to replace the cam shaft.

Abstract: A portable tire bead breaker includes a base over which a tire and rim may be placed, a beam attached to the base and extending upwardly therefrom, an arm assembly pivotally attached to the beam so as to extend over the base, and a driver attached to the arm and extending downwardly towards the base. The arm assembly includes an arm attached to the beam at a first pivot point and a cam connected to the beam at a second pivot point. The arm includes opposing arcuate slots and the cam includes a pin slidingly disposed within the slots. The driver has foot at a lower end thereof, and the length of the driver is adjustable. To break a tire bead, a handle is connected to the cam which is pivoted to cause the arm to pivot and the driver to be increasingly extended downwardly until the foot engages the tire and breaks a seal between the tire and the rim. The tire bead breaker can be folded into a compact unit for storage and transportation.

Abstract: The improved tire changer tool set of the present invention includes a tire rim engager and a lever. The tire rim engager is in the form of a disc having a depending peripheral portion which may be a detachable ring and which is adapted to securely seat the engager in the rim of a tire. The tire rim engager also includes an upstanding generally central post having an expanded top which retains the lever in position around the post. The tire rim engager can have an annular recess on its bottom surface to receive the top portion of the detachable ring. Such ring can be held in place with screws through the disc and ring. Rims of different diameters can be installed on the disc. The lever is long and generally flat with two portions connected by a step so that when the lever is connected to the post by a side notch in the lever, one portion of the lever is raised and can act as a handle in rotating the lever around the post.