Front One-way Pulley 40T for BD7/BD5 - BD-643F Yokomo  [BD-643F]

Yokomo BD-643F Front One-way Pulley 40T for BD7/BD5
Price:
£3.03
Brand:
Yokomo
Model:
BD-643F
GTIN:
3888
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BD-643F front pulley: purpose and fit

The Yokomo BD-643F is a 40T front one-way pulley intended for BD5 and BD7 front one-way assemblies in scale RC cars. It acts as a direct replacement to restore or fine-tune front drivetrain engagement and is provided with the basic screws required for installation.

This product is supplied as a single 40T pulley designed exclusively for the front one-way/differential assembly of the model drivetrain and does not relate to real vehicle components.

Fitting advice: remove the front one-way hub in accordance with your chassis instructions, position the BD-643F on the hub, tighten the supplied fasteners, and ensure the pulley spins freely and engages correctly before using the model. Do not overtighten and make sure the pulley orientation matches the one-way mechanism.

Packing includes

  • 40T One-way Pulley x 1 pcs
  • Nabe screw 2 x 5 mm RH Screw x 3

Compatibility

  • DP-DIB2
  • DP-DIB2R
  • DP-DIB2A
  • DP-DIB2RA
  • DP-DIB
  • DP-DIBR
  • DP-DIBG
  • DP-DIBRS
  • DP-DIBL
  • DP-DIBLR
  • DP-DIBLG
  • DP-DIBRSB
  • MRTC-BD7RS
  • MRTC-BD715B
  • MRTC-BD715O
  • MRTC-BD715S
  • MRTC-BD7RS2
  • MRTC-BD7RS3S
  • MRTC-BD8SV
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.

Does BD-643F require any other part changes to fit BD7 models?

In most cases the BD-643F fits directly into BD7 front one-way assemblies without additional parts. Inspect the one-way hub and related components for wear and replace as necessary to ensure correct mating.

What is the recommended procedure to secure the pulley?

Use the supplied Nabe screws to fasten the pulley, tighten gradually and check rotation after each stage. Final torque should ensure the pulley is secure without restricting free spin.

How to verify correct engagement after installation?

Manually rotate the front drivetrain to confirm the one-way locks and releases as expected, then run a short controlled test to validate engagement under operational loads.

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