Yokomo YZ-630W1 Centre One-Way Pulley for YZ-W91TS & YZ-W91  [YZ-630W1]

Yokomo YZ-630W1 Center One-Way Pulley for Works\\\'91 TeamSpec
Price:
£20.41
Brand:
Yokomo
Model:
YZ-630W1
GTIN:
3888
Condition:
Brand New
Quantity Discount
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One-way centre pulley for YZ-W91-series chassis

The YZ-630W1 is a centre one-way pulley intended for Works'91 TeamSpec installations on YZ-W91 series chassis. Its internal one-way bearing locks during drive input and permits free spin on braking, which changes torque distribution and produces a different mid-corner and exit characteristic compared with a standard two-way pulley.

Fitting requires the YZ-631W1 main shaft for correct alignment and bearing preload; do not fit the pulley without that shaft. The component is supplied as an aftermarket spare for compatible YZ-W91TS and YZ-W91 platforms and should be assembled with matching drivetrain bearings and correct torque to avoid premature wear.

For setup, note that the one-way centre affects power flow between front and rear under acceleration and deceleration. Test progressively and adjust other elements such as diff locking and suspension only after assessing the pulley impact in isolation.

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.

The YZ-630W1 is suited to drivers seeking predictable increased drive locking under acceleration while maintaining free rotation when braking; confirm YZ-W91TS/YZ-W91 compatibility before installing.
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.

Will this unit fit other Yokomo models?

It is specified for YZ-W91TS and YZ-W91 platforms only. Using it on other models may require different shafts or modifications and is not recommended.

What should I check before removing the old pulley?

Confirm you have the YZ-631W1 main shaft and the correct bearing set. Inspect the transmission for wear and ensure you can achieve the specified assembly torque before disassembly.

Does the pulley change behaviour during braking?

Yes. Under braking the pulley spins freely, reducing driveline resistance compared with when it is locked under drive. Expect different rotation and response entering corners when trail-braking.

Any assembly tips to avoid premature wear?

Use the correct main shaft, fit bearings with proper attention to cleanliness and lubrication, and torque fasteners to spec. Recheck bearing endplay after initial running and at routine service intervals.

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