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

Yokomo Z4-309-8 8mm Width Rear Belt 103T for YZ-4
Price:
£5.24
Brand:
Yokomo
Model:
Z4-309-8
GTIN:
3888
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Rear belt specification for YZ-4

The Z4-309-8 is a replacement rear belt specified for the Yokomo YZ-4 4WD off-road car. The belt length is 309mm, it has 103 teeth and an 8mm nominal width, matching the factory rear drivetrain routing for the model.

Choose this belt when performing a drivetrain rebuild or replacing aged timing belts to restore original spacing. Prior to fitting, inspect pulley grooves and drive parts for wear, route the belt on each pulley following the original layout, and tension carefully to remove slack while avoiding excess bearing strain.

Keeping the correct 103T and 8mm belt specification ensures steady tooth engagement between spur and pinion and preserves reliable torque transfer across the system.

Compatibility

Compatible with B-YZ4 chassis and the YZ-4 4WD off-road car platform.
Remark :
Due to limited stock availability, please notice that some Yokomo items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

Is the Z4-309-8 an exact fit for stock YZ-4 setups?

Yes. The Z4-309-8 matches the stock dimensions and tooth profile for standard YZ-4 rear drivetrain configurations and fits the B-YZ4 chassis as intended.

Can I use this belt with modified pulleys or chassis variants?

If pulleys or chassis parts have been altered, check tooth engagement and spacing carefully; the Z4-309-8 is designed for stock pulley geometry, so modifications may require different sizing.

What routine checks should I perform after replacement?

After fitting, run the car briefly and reinspect belt tension and alignment, then schedule regular checks for wear signs such as fraying, tooth rounding, or slippage.

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