Kyosho UM509B 52T Differential Gear Set for RB5  [KY-UM509B]

Kyosho UM509B - Diff. Gear Set(52T/RB5)
Price:
CAD$14.07
Brand:
Kyosho
Model:
KY-UM509B
GTIN:
4548565470624
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Kyosho UM509B 52T diff gear set for RB5 maintenance

The Kyosho UM509B Diff Gear Set with its 52-tooth layout is a practical replacement part for RB5 models. Engineered to match RB5 fitment, this unit is suitable for regular club running and yard practice where dependable gearing matters.

Compatibility and expected behaviour

This differential gear set is made to fit the RB5 platform, giving a correct mesh and consistent rotation under common driving conditions. The 52T ratio aims to balance traction and drivability so you can tune handling without major drivetrain changes.

Fitting advice and care

When fitting the Kyosho UM509B Diff Gear Set make sure pinions and ring gear are aligned and fasteners are torqued to spec. Check gear oil and bearings periodically to avoid premature wear and keep the unit running smoothly.
Remark :
Due to limited stock availability, please notice that some Kyosho 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.

Will the Kyosho UM509B work with earlier RB5 versions?

The UM509B is intended for RB5 specification gear housings; while many RB5 builds share the same layout, confirm your chassis spec before fitting other vintage variants.

What gear oil should I use with a 52T diff?

Use a quality diff oil that matches your driving style; medium-weight oils give predictable handling for general club running, while thicker oils increase center traction.

How do I know when to replace the diff gears?

Inspect for pitting, excessive backlash, or metal shavings after hard runs; noticeable noise or inconsistent engagement are signs to replace the gears.

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