B-YZ4 / YZ-4 Compatible Rear Belt 103T 8mm - Z4-309-8 by Yokomo  [Z4-309-8]

Yokomo Z4-309-8 8mm Width Rear Belt 103T for YZ-4
Price:
NZD$11.73
Brand:
Yokomo
Model:
Z4-309-8
GTIN:
3888
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YZ-4 rear drive replacement

The Z4-309-8 rear belt is supplied as a replacement option for the Yokomo YZ-4 4WD off-road car. Length is 309mm with a 103T tooth count and an 8mm nominal width to match the original rear drivetrain layout.

Fit this belt when you need to restore stock geometry or replace a tired timing belt. Before installation, examine pulley grooves and drive parts for damage, route the belt on every pulley following the original pattern, and set moderate tension to eliminate slack without stressing bearings.

During setup the correct 103T, 8mm belt helps maintain steady engagement between spur and pinion and supports consistent torque transfer across the 4WD 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.

How long should I expect this belt to last under normal use?

Service life varies with use and conditions, but regular inspection for tooth wear and fraying will indicate when the Z4-309-8 needs replacement to avoid drivetrain issues.

Does the 8mm width improve durability?

The 8mm nominal width matches the stock specification and helps preserve pulley contact area; durability depends on correct tension, pulley condition, and driving conditions.

When should I inspect belts after installation?

Check belt condition after the first short run and then at regular service intervals; early checks catch alignment or tension issues before they cause tooth damage.

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