Yokomo YOKR12-6490 Precision 90T 64-Pitch Spur for R12 (Black)  [YOKR12-6490]

Yokomo R12-6490 - 90T/64Pitch Precision Spur Gear for R12(Black)
Price:
£6.95
Brand:
Yokomo
Model:
YOKR12-6490
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R12 90T 64-Pitch Spur Overview

The Yokomo YOKR12-6490 is a precision spur gear specified for R12 chassis use, offering a 90-tooth count in 64-pitch to ensure consistent meshing characteristics. The item notes accurate tooth geometry that supports fine ratio tuning while leaving the pinion unchanged, useful for balanced on-road drivetrain tuning.

Fitment and role: designed for R12-series platforms that accept 64-pitch gearing, it serves as the main driven gear that engages the motor pinion to establish the total gear ratio. Selecting a different tooth count produces changes in acceleration and maximum speed at the model scale, so this gear is best for incremental tuning rather than complete drivetrain redesigns.

Installation notes: confirm your chassis specification supports 64-pitch spur gears before fitting, set gear mesh with the motor pinion to get an even contact pattern across the tooth face, and ensure the spur mounts flat on its hub with no lateral play. Verify bearing condition and drivetrain alignment after installation to avoid premature wear; handle using appropriate RC-level tools.
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.

Do I need to change my pinion when fitting this spur?

Not necessarily. The spur allows you to alter overall ratio without swapping the pinion, but pairing with different pinions will produce larger ratio shifts if required.

How will a 90T gear influence handling?

A 90T spur changes the driven ratio and therefore shifts the balance between acceleration and top speed; it is intended for measured adjustments rather than dramatic handling changes.

Where can I find confirmation of compatibility?

Check your R12 chassis documentation or the product listing to ensure it accepts 64-pitch spur gears; the description specifies pitch and tooth count but does not list every compatible variant.

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