Abstract: To shift the resonant (peak) hydraulic pressure vibration frequency, caused when hydraulic pressure varies by brake unit torque fluctuations due to worn-away brake rotor for instance, away from the brake shimmy generation range (e.g. 10 to 17 Hz), an auxiliary pipe is additionally connected between a first pipe connecting the master cylinder to the right side hydraulic cylinder and a second pipe connecting the master cylinder to the left side hydraulic cylinder in the vicinity of the two hydraulic cylinders.

Abstract: A brake actuator for an all-terrain vehicle, the actuator including a housing and a cover, a hand-operated lever arm pivotally mounted in the housing and projecting outwardly from the housing through said cover, the lever arm being operatively connected to the brake cables for the wheels, a locking segment mounted for pivotal movement in the housing, a ratchet-type cam surface on the segment, the segment being biased to move into locking engagement with the lever arm, the ratchet-type cam surface being spaced at progressively greater distances from the pivot axis to block the lever arm at increasing distances from the brakes.

Abstract: A four wheel off the road vehicle having a pair of dirigibly supported front wheels each carrying a respective brake. The front wheels are steered by a centrally journaled steering shaft that carries a handlebar at its upper end with a brake actuator. A brake equalizing device is disposed adjacent the longitudinal center line of the vehicle adjacent the steering shaft and transmits braking forces from the brake actuator to the front wheel brakes.