Works'91 TeamSpec Center One-Way Pulley for YZ-W91TS / YZ-W91 - YZ-630W1 by Yokomo  [YZ-630W1]

Yokomo YZ-630W1 Center One-Way Pulley for Works\\\'91 TeamSpec
Price:
AUD$38.42
Brand:
Yokomo
Model:
YZ-630W1
GTIN:
3888
Condition:
Brand New
Quantity Discount
Unit Price You Save
2 $58.65 each $-40.45 or -53%
3+ $52.79 each $-43.08 or -37%
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Centre one-way pulley for tuned corner response

The YZ-630W1 is a centre one-way pulley made for Works'91 TeamSpec applications on YZ-W91 chassis. By housing a one-way bearing inside the pulley the assembly locks when torque is applied and rotates freely when the drivetrain is back-driven, which changes how torque is delivered and gives a different mid-corner and exit characteristic versus a standard pulley.

Installation must include the proper YZ-631W1 main shaft to guarantee correct alignment and bearing preload; do not attempt to fit the pulley without that shaft. This part is an aftermarket spare for compatible YZ-W91TS and YZ-W91 platforms and should be used with matched bearings and correct assembly torque to avoid premature failure.

In practical setup, the one-way centre will influence power distribution between the axles during acceleration and deceleration. Tuning should be performed progressively, evaluating handling changes against baseline setups and adjusting diff or suspension components only after collecting clear data.

Key specifications

  • Item: Center one-way pulley.
  • Model Number: YZ-630W1.
  • Function: Internal one-way bearing locks on drive, free on braking.
  • Compatibility: YZ-W91TS, YZ-W91.
  • Notes: Use with YZ-631W1 main shaft.

Use the YZ-630W1 to explore increased drive locking on acceleration while keeping free rotation under braking; confirm platform compatibility before installation.
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.

What setup changes show the biggest effect after fitting?

The most noticeable effects are on corner entry traction and on-power rotation. Compare runs with identical diff and suspension settings to identify the pulley influence, then tweak diff preload and roll stiffness to refine balance.

Should I alter diff settings when using this pulley?

Often small reductions in diff locking or changes to diff oil viscosity help balance the increased drive engagement. Make incremental adjustments and log lap times to find the best compromise.

Does tyre choice interact with the one-way centre?

Yes. Higher grip tyres will magnify the locking effect, while lower grip compounds may hide it. Test with your usual tyre choices to determine combined behaviour.

Any quick checks after installation?

Verify main shaft seating, bearing spin freeplay, and that there is no binding under suspension travel. Run a short low-speed test to confirm expected free rotation when braking.

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