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

Yokomo B9-644SSA Main Gear Shaft Set
Price:
CAD$21.35
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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BD9 Drivetrain Upgrade with Yokomo B9-644SSA

The Yokomo B9-644SSA Main Gear Shaft Set fits the BD9 chassis and brings tight tolerances that help maintain drivetrain alignment and consistent operation. Built for endurance, this shaft set supports stable power delivery and reduces drivetrain slop under load.

Tuned Fit for BD9 Platforms

The B9-644SSA from Yokomo is finished to precise standards and is compatible with MRTC-BD919 and MRTC-BD919S chassis variants. Its construction focuses on longevity so you can spend more time running and less time replacing parts.

Track-Oriented Benefits

Racers will notice smoother acceleration and steadier top-end response when the drivetrain runs with minimized friction. The B9-644SSA helps keep gear mesh consistent, which aids handling and lap-to-lap repeatability.
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.

Will this shaft fit earlier BD9 versions?

Check your chassis part numbers; the B9-644SSA is made for BD9 series builds and lists MRTC-BD919 and MRTC-BD919S as compatible models. If your BD9 uses the same mounting points, it should fit.

How difficult is installation for a hobbyist?

Installation is straightforward with basic hobby tools. Remove the stock shaft, check gear mesh, and install the B9-644SSA while confirming alignment and free rotation before running.

Any maintenance tips to extend service life?

Keep gears clean and properly lubricated, inspect for wear after frequent hard runs, and recheck mesh and mounting fasteners to prevent premature wear.

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