Kyosho UM509B 52T Replacement Diff Gear for RB5  [KY-UM509B]

Kyosho UM509B - Diff. Gear Set(52T/RB5)
Price:
£7.62
Brand:
Kyosho
Model:
KY-UM509B
GTIN:
4548565470624
Condition:
Brand New
Quantity Discount
Unit Price You Save
2 £6.51 each £2.23 or 15%
3+ £6.18 each £4.31 or 19%
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Kyosho UM509B 52T diff gear set designed for RB5

The Kyosho UM509B Diff Gear Set uses a 52-tooth arrangement and serves as a direct replacement for RB5 models. It is intended to return correct gear engagement and steady rotational behaviour for everyday running.

Performance, fitment and notes

Manufactured for the RB5 chassis, this differential set ensures proper alignment and reliable meshing. The 52T choice balances traction and driveability so you can maintain consistent lap times or leisure runs.

Fitting guidance and maintenance routine

When installing the Kyosho UM509B Diff Gear Set check gear mesh, bearing seating and bolt torque. Regular inspections and fresh grease or oil as recommended will keep the diff performing well over time.
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.

Is the UM509B a direct drop-in for the RB5?

In most RB5 builds the UM509B installs without modification, but verify your current gearbox components to confirm full compatibility.

Can I tune handling by changing diff oils with this gear?

Yes, swapping diff oil viscosity is an effective way to fine tune balance and traction while keeping the same 52T gear set.

Any tips to prolong gear life?

Keep gears clean, use appropriate lubricants and inspect for wear after heavy sessions; addressing bearing wear early prevents gear damage.

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