Upgrade Spur Gear for R12 Chassis, 90T 64-Pitch - Yokomo YOKR12-6490 (Black)  [YOKR12-6490]

Yokomo R12-6490 - 90T/64Pitch Precision Spur Gear for R12(Black)
Price:
AUD$13.45
Brand:
Yokomo
Model:
YOKR12-6490
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90-Tooth 64-Pitch Spur Built for R12

The Yokomo YOKR12-6490 is a precision spur gear intended for R12 chassis setups, featuring 90 teeth at 64-pitch to provide steady engagement and repeatable tooth contact. The write up stresses precise tooth form suited to subtle ratio adjustments without swapping the pinion, making it useful for balanced on-road tuning tasks.

Fitment and role: this item is made to fit R12-series arrangements that take 64-pitch gears and functions as the principal driven gear that meshes with the motor pinion to set the overall drive ratio. Altering the number of teeth changes acceleration and top speed behavior at scale, so consider this for measured tuning rather than complete drivetrain rework.

Installation notes: confirm compatibility with 64-pitch gearing on your chassis prior to fitting, check and set gear mesh so the contact pattern is even across the tooth face, and make sure the spur is seated flush on its mounting hub with no lateral play. After installation inspect bearing support and alignment to prevent uneven wear; use appropriate RC tools when handling.
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 should I check gear mesh after installing this spur?

Set the pinion next to the spur, apply a thin film of gear marking compound or a strip of paper, rotate to observe contact, and adjust until the pattern is centered across the tooth face.

Will this part change drivetrain wear rates?

Any change in gearing can affect wear; correct mesh and alignment reduce uneven wear, so follow installation guidance and check bearings and supports regularly.

Is this suitable for aggressive on-road setups?

The gear is described for scale tuning and predictable engagement; suitability for aggressive setups depends on your overall drivetrain components and should be evaluated on a case by case basis.

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