All Balls Racing – Chassis Bearings & Hardware - Kawasaki, including the 08-22 ZG1400 Concours clutch slave cylinder rebuild kit and, for the 95-05 Vulcan VN800A, an air cut-off valve rebuild kit and a choke plunger kit. These are the small hydraulic and fueling components on a street bike or cruiser that create symptoms far bigger than the parts themselves. A leaking clutch slave cylinder gives you a lever that slowly loses travel, a clutch that will not fully disengage at a light, and fluid weeping onto the case; a rebuild kit with fresh piston seals restores clean shifts and full engagement. On the Vulcan, a cracked air cut-off valve diaphragm causes popping and backfiring on deceleration, while a worn choke plunger makes cold starts a chore and can leave the mixture rich once warm. Replacing them with correct-spec seals and plungers gets throttle response and idle back where they belong. Bleeding the clutch hydraulics properly after a slave rebuild makes the lever feel new. Year splits and carb variants matter on these models. Tell us your year and model and we'll confirm the right Kawasaki rebuild kit before you order.