Yokomo B9-501MA Molded Spool Track Upgrade  [B9-501MA]

Yokomo B9-501MA Molded Spool for BD9 2019
Price:
NZD$12.05
Brand:
Yokomo
Model:
B9-501MA
GTIN:
0639342204687
Condition:
Brand New
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Precision Resin Spool for BD Chassis

The Yokomo B9-501MA molded spool is made for BD9 2019 and related BD chassis models. Built from quality resin, it features an integrated pulley to maintain smooth drivetrain rotation during races.

Designed for Multiple BD Variants

Compatible with a broad range of models including MRTC-BD919, MRTC-BD10 and MSR-BD11, this spool offers a snug fit and consistent operation across BD series cars. It makes a practical upgrade for drivers fine tuning their setup.

Improving Drive Efficiency

Its robust resin construction and pulley integration help improve power delivery and reduce slop in the driveline. The Yokomo B9-501MA is aimed at hobbyists who want reliable, repeatable performance lap after lap.
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 easy is the B9-501MA to install?

Installation is straightforward for anyone familiar with BD series layouts. Remove the old spool, check the shaft and pulley alignment, then fit and secure the new unit.

Will the spool change gear feel or ratio?

The B9-501MA replaces the spool component without altering final gearing in most setups. It mainly affects driveline smoothness and response rather than gear ratio.

Is resin durable enough for regular club racing?

Yes, high quality resin is commonly used in competition parts. It balances light weight and impact resistance, though regular inspection after heavy use is advised.

Can I swap this spool between BD chassis lines?

You can move the spool between compatible BD platforms, but confirm fitment and clearances for each chassis before running it in competition.

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