Kyosho UM737 - 40T Idler Gear for RB6.6/LD Precision Race Idler  [KY-UM737]

Kyosho UM737 - SP Idler Gear (40T/RB6.6/LD)
Price:
£4.82
Brand:
Kyosho
Model:
KY-UM737
Condition:
Brand New
Quantity Discount
Unit Price You Save
2 £4.31 each £1.01 or 11%
3+ £4.10 each £2.15 or 15%
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Refined Gear Mesh with Kyosho UM737

Fit the Kyosho UM737 40T Idler Gear to maintain precise mesh on RB6.6 and LD chassis. The component is finished to tight tolerances so power delivery stays consistent under load.

Precision Machining for Reliable Use

The Kyosho 40T idler is produced to hold accurate tooth profiles, reducing the risk of slippage and smoothing power transfer during aggressive throttle inputs. The robust build copes with repeated track use.

Compatibility Tips and Fitment Advice

Intended for Kyosho RB6.6 and LD models, the idler integrates with standard gear stacks. After fitting, recheck mesh and make minor adjustments for optimal drivetrain balance.
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 this improve lap consistency?

By stabilising tooth engagement and reducing intermittent slip, the idler can help keep power delivery more predictable, which supports consistent lap times.

How do I check for correct mesh?

Set a small gap or use a mesh gauge between pinion and spur, then spin the drivetrain to confirm smooth engagement across the full rotation.

Does it need regular replacement?

Replacement interval depends on use; inspect teeth regularly and swap the idler if you notice chipped teeth, excessive wear, or increased play.

Are upgrades available for this idler?

There are aftermarket options for different materials and coatings; evaluate trade offs between weight, durability and cost before upgrading from the Kyosho UM737.

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