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

Yokomo BD-643F Front One-way Pulley 40T for BD7/BD5
Price:
CAD$5.66
Brand:
Yokomo
Model:
BD-643F
GTIN:
3888
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Front one-way pulley for BD7 and BD5 front units

The Yokomo BD-643F is a 40T front one-way pulley designed for use with BD5 and BD7 front one-way assemblies in RC models. It functions as a direct replacement to recover or adjust front drivetrain engagement and is supplied with basic fastening hardware for installation.

This item is supplied as a single 40T pulley intended specifically for the front one-way unit. Its application is limited to the scale model drivetrain front differential/one-way assembly and is not relevant to full-size vehicle systems.

Installation notes: follow your chassis service routine to remove the front one-way hub, fit the BD-643F pulley onto the hub, secure with the included fasteners, and confirm free rotation and correct engagement before operating. Avoid overtightening and verify the pulley orientation matches the one-way unit design.

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.

Is the BD-643F suitable for both BD5 and BD7 front one-way assemblies?

Yes. The BD-643F is specified for BD5 and BD7 front one-way assemblies as shown in the compatibility list. Confirm fitment against your chassis parts before final installation.

What hardware is included with the pulley?

The package contains the single 40T pulley plus the fasteners listed under "Packing includes". Use these screws when reinstalling the pulley to ensure proper fit.

Any assembly tips before the first run?

Check orientation of the one-way unit, hand-tighten the fasteners to seat the pulley, verify free rotation and engagement, then perform a short bench test before track use.

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