GY6 17/49T Starter Reduction Gear
ITEM# TT-26906
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Description
Starter Reduction Gear for GY6 Engines
This starter reduction gear is built for GY6 engines and helps bring back dependable electric starting. It works well as a substitute for gears that have worn down or been damaged. You can find it among our GY6 scooter parts, which help keep your scooter running smoothly. Its stepped, two-stage construction handles power transfer in electric-start setups.
Two-Stage Gear Layout
The gear uses a two-stage arrangement with a 17-tooth upper gear and a 49-tooth lower gear. Together these gears transfer torque efficiently, which matters for consistent starting on electric-start systems. The stepped build also makes installation easier, since the step offers clear points to line up against the original part.
Compatibility and Fitment
This gear suits GY6 starter setups from 125cc to 150cc, along with a range of applications based on the 157QMJ engine. Before buying, check your original part's specs, including bore diameter and tooth count, to confirm it will fit. It is made to match systems that use the same gear layout, so it works as a direct replacement option.
Specifications
- Component: Starter reduction gear
- Inner Diameter: 10 mm
- Upper Gear Teeth: 17
- Lower Gear Teeth: 49
- OEM Part Number: 3121002
- Fits: GY6 150cc (157QMJ) engines with 17/49-tooth starter reduction gear and 10 mm bore
Fitment
Fits:
- GY6 150cc (157QMJ) (10 mm bore, 17 upper teeth, 49 lower teeth)
How to choose: Make sure the 10 mm center bore and the 17 upper / 49 lower tooth count match your original starter reduction gear.
Where it goes: part #1 on the starter diagram for the GY6 150cc (157QMJ).
Shop more: GY6 Scooter Parts · Chinese Scooter Parts · Scooter Starters & Relays · Scooter Transmission & Final Drive · Scooter Parts
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