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

Rear belt for YZ-4

This is a standard replacement rear belt designed for the Yokomo YZ-4 4WD off-road car. The belt is 309mm in length, has 103T tooth count and an 8mm nominal width, matching the original rear drivetrain routing for the model.

Use this belt when restoring stock drivetrain geometry or replacing a worn timing belt. Before installation inspect pulley grooves and drive components for wear, align the belt on all pulleys following the original routing, and adjust tension to remove slack without over-tightening to avoid added bearing load.

In setup and tuning the belt primarily ensures consistent engagement between the spur and pinion path and maintains reliable torque transfer across the 4WD layout, so choose the matched 103T, 8mm belt to preserve factory spacing and tooth engagement.

Compatibility

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