YZ-4 Main Shaft Upgrade (Hard Anodized) - Yokomo Z4-644H [Z4-644H]

Price:

£2.83

Brand:

Yokomo

Model:

Z4-644H

GTIN:

3888

Not Available

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Description
FAQ

Main shaft upgrade for YZ-4

This optional main shaft, listed as Yokomo Z4-644H, is made from aluminium and treated with a hard anodized finish to cut weight while improving surface wear resistance. It is supplied for drivetrain use on YZ-4 cars.

In service the shaft lowers rotating mass on the gearbox axis and can produce sharper throttle response during tuning. Effects are modest and intended for setup refinement rather than structural driveline redesign.

Fitment guidance: replacing the stock main shaft requires basic gearbox teardown to access the shaft and bearings. After installation, verify bearing alignment, clearances and secure seating before operation. The source does not indicate required special tools or permanent chassis changes.

Compatibility

B-YZ4
YZ-4

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 checks should I perform after fitting the new shaft?

Immediately after installation confirm bearing seating, axial play and that the shaft is fully located; recheck these items after a short test run to ensure nothing has shifted.

Does swapping to this part require gearbox modification?

No major modifications are specified. The swap involves standard disassembly and reassembly procedures; simply verify clearances and alignment when refitting bearings and covers.