3Racing SAK-U121/PK 20T Racing Gear Adaptor for Sakura Ultimate  [SAK-U121/PK]

3RACING Sakura Ultimate 20T Gear Adaptor - SAK-U121/PK
Price:
USD$18.90
Brand:
3Racing
Model:
SAK-U121/PK
Condition:
Brand New
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Technical overview of the 3Racing 20T adaptor

The 3Racing Sakura Ultimate 20T Gear Adaptor, SAK-U121/PK, is produced to support precise drivetrain setups for the Sakura Ultimate platform. Its 20-tooth geometry focuses on steady engagement and repeatable behaviour under load, aiding lap-to-lap consistency. The part interfaces directly with Sakura Ultimate gearbox mounts to minimize fitment variables during setup changes.

Design and setup considerations

This adaptor emphasises predictable torque transfer and reduced transient lash, which assists in tuning suspension and throttle mapping for competitive running. When installing, confirm correct mesh and torque settings to avoid premature wear and to maintain consistent contact patterns between drive gears.

What is the best method to set gear mesh with the SAK-U121/PK?

Use a thin paper or marker to establish initial mesh, then rotate the gearbox to seat teeth and recheck contact pattern. Aim for even tooth contact across the face to prevent edge loading.

Which tuning benefits come from the 20T adaptor?

The 20T profile provides consistent engagement that reduces drivetrain feedback, allowing finer adjustments to pinion size and motor mapping to optimise acceleration and traction for race conditions.

Any precautions for high-power setups?

For high-power motors, ensure fasteners are correctly torqued and inspect gear faces more frequently. Consider progressive break-in and monitor for any signs of tooth fatigue during initial runs.