Yokomo S4-503R16A 40T Differential Ring for YZ-4S - Durable Option  [S4-503R16A]

Yokomo S4-503R16A 40T Ring Gear[Use w/16T D Gear]for YZ-4S Gear diff
Price:
NZD$47.84
Brand:
Yokomo
Model:
S4-503R16A
GTIN:
0639342210381
Condition:
Brand New
Write a review

Improve YZ-4S Differential Smoothness

The Yokomo S4-503R16A 40T ring gear is intended for the YZ-4S gear differential and provides accurate tooth engagement for reliable power delivery when matched with a 16T drive gear. Suitable for several YZ-4S-based chassis, this ring gear helps maintain consistent handling during track sessions.

Specifications

  • Tooth Count: 40T
  • Compatibility: Compatible 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.

Can I use this ring gear on non-YZ-4S cars?

It is optimised for YZ-4S layout; other cars may accept it if their diff cup and mounting match the YZ-4S dimensions. Measure before buying to avoid fit issues.

How does tooth count affect handling?

A 40T ring offers a middle ground that helps preserve torque while retaining usable top-end, which can improve traction transitions on varied track surfaces.

Is special maintenance required?

Regular inspection for wear and correct gear mesh are all you need. Replace if tooth wear or chipping appears to avoid differential damage.

Copyright © 2008-2025 rcjaz.co.nz All rights reserved