Yokomo B9-644SSA BD9 Main Gear Shaft Set Race Replacement  [B9-644SSA]

Yokomo B9-644SSA Main Gear Shaft Set
Price:
AUD$23.26
Brand:
Yokomo
Model:
B9-644SSA
GTIN:
0639342182572
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Or you may find similar product under the
Spares / Hop-ups - Yokomo - MRTC-BD919S category
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Refine Your BD9 Drivetrain with Yokomo B9-644SSA

The Yokomo B9-644SSA Main Gear Shaft Set is produced for BD9 chassis compatibility and helps maintain clean gear engagement. The precise shaft finish lowers mechanical slack and supports smooth rotation under load.

Compatibility with MRTC-BD919 Chassis

Yokomo designed the B9-644SSA to match the MRTC-BD919 and MRTC-BD919S mounting and spacing. The set is built to resist wear so you can depend on it across multiple race weekends.

Why Racers Choose This Shaft Set

Reducing drivetrain friction leads to more consistent lap times and easier setup tuning. The B9-644SSA supports better throttle feedback and helps maintain consistent gear mesh during hard acceleration.
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.

Is any machining required before fitting?

No machining should be necessary if your BD9 chassis matches the listed compatible models. Inspect the fit and clean mating surfaces before assembly.

Will this improve drivetrain noise?

A correctly installed B9-644SSA can reduce gear squeal and vibration by maintaining better alignment, though final noise levels depend on gear condition and lubrication.

Should I replace other components at the same time?

Inspect spur gears, pinion, and bearings when changing the main shaft. Replacing worn items together ensures optimal performance and prevents uneven wear.

Can this shaft handle brushless setups?

Yes, the B9-644SSA is suitable for modern powertrains. Ensure your motor and gearing choices are appropriate for your chassis and track conditions.

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