YZ-4 8mm Rear Belt 103T Z4-309-8 for Yokomo  [Z4-309-8]

Rear timing belt for YZ-4 vehicles

The Z4-309-8 rear belt is a replacement component for the Yokomo YZ-4 4WD off-road car. It comes in a 309mm length with 103 teeth and an 8mm nominal width to preserve the original rear drivetrain routing.

Install this belt when swapping out a worn timing belt or when returning the drivetrain to factory spacing. Inspect pulleys and driveline parts for wear before fitting, route the belt exactly on the pulleys as originally routed, and tension just enough to remove slack while avoiding excess bearing load.

From a tuning perspective, maintaining the matched 103T and 8mm specification keeps consistent mesh between spur and pinion and prevents unpredictable torque transfer across the 4WD layout.

Compatibility

Compatible with B-YZ4 chassis and the YZ-4 4WD off-road car platform.