Yokomo S4-503R16A 40T YZ-4S Ring Gear - Reliable Replacement  [S4-503R16A]

Yokomo S4-503R16A 40T Ring Gear[Use w/16T D Gear]for YZ-4S Gear diff
Price:
£20.76
Brand:
Yokomo
Model:
S4-503R16A
GTIN:
0639342210381
Condition:
Brand New
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Restore Smooth Differential Operation on YZ-4S

The Yokomo S4-503R16A 40T ring gear is intended for the YZ-4S gear differential and provides accurate tooth profiles for steady power transfer with a 16T drive gear. It supports several YZ-4S chassis and is a straightforward replacement part for worn components.

Specifications

  • Tooth Count: 40T
  • Compatibility: Intended for use with 16T drive gear
  • Supported Chassis: B-YZ4SF, B-YZ4SF2-1, MOR-010, MOR-020
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 S4-503R16A a direct replacement part?

For YZ-4S differentials it serves as a direct replacement, provided the chassis is one of the supported models. Confirm fitment before fitting into other vehicles.

How should I check gear mesh after fitting?

Set a light, even mesh with a single sheet of paper test or by measuring backlash. Tight mesh increases wear, loose mesh causes skipping.

Will this change vehicle gearing?

The ring gear tooth count stays at 40T; pairing it with a 16T drive gear keeps the intended differential behaviour and overall gear ratio as designed.

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