Yokomo BM-503 Diff Ring Gear for B-Max4, differential ring gear replacement, 2 pcs set  [BM-503]

Yokomo BM-503 Diff. Ring Gear for B-Max4
Price:
USD$3.40
Brand:
Yokomo
Model:
BM-503
GTIN:
3888
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Diff Ring Gear for B-Max4

The Yokomo BM-503 is a direct replacement diff ring gear intended for use in B-MAX4 RC differential assemblies. This item is supplied as two ring gears and is designed for scale model differential rebuilds and routine maintenance rather than any real vehicle application.

When repairing or refreshing a B-MAX4 differential, matching the ring gear tooth count and fit is important for consistent mesh and predictable handling. The BM-503 units are suitable where the stock ring gear requires replacement during rebuilds or when preparing a diff for tuning work.

Installation notes: confirm the ring gear seats flush on the differential case, check pinion-to-ring gear mesh with a shim method appropriate for your spur and pinion setup, and test spin smoothness before final assembly. Use compatible bearings and hardware from the B-MAX4 parts list to avoid fitment issues.

Packing includes

  • Diff Ring Gear x 2 pcs
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.
They are intended for standard B-MAX4 differential assemblies; verify the ring gear tooth count and mounting flange match your diff case before installation.
The package includes two ring gears, listed as 2 pcs.
No special tools beyond standard hobby tools are required, though a press or careful tapping with correct fixtures can aid seating the ring gear evenly.

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