420 15T Front Sprocket – 20 mm Countershaft
Brand-new unbranded 420 pitch, 15-tooth front drive sprocket for selected horizontal pit-bike and ATV engines using the larger 20 mm countershaft spline pattern.
Product Details
- Position: Front / countershaft sprocket
- Chain pitch: 420
- Tooth count: 15T
- Countershaft family: Large 20 mm type
- Spline count: 6
- Condition: Brand new
- Type: Unbranded aftermarket replacement
- Quantity: 1 sprocket
Verified Fitment Family
| Make / Engine | Application | Notes |
|---|---|---|
| Lifan | Selected 125cc horizontal engines with 20 mm countershaft | 20 mm large-shaft family; verify shaft before ordering |
| Zongshen | Selected 125cc 54 x 54 mm horizontal engines | DrATV documents 14T/15T 420 sprockets for the 20 mm countershaft |
| SSR | SR125TR / selected 125TR applications | 20 mm large-shaft family; 420 final drive |
Important Fitment Information
This is the larger 20 mm countershaft pattern. It is not interchangeable with the more common smaller 17 mm pit-bike sprocket. Compare the output shaft and existing sprocket before ordering.
Do not order by engine capacity alone. Chinese horizontal engines use more than one countershaft spline size. Many YX/Piranha engines and several SSR/Pitster Pro models use the smaller 17 mm pattern, which is not the same as this 20 mm sprocket.
What's Included
One 420 pitch, 15-tooth front sprocket. Retainer plate, bolts and other fitting hardware are not stated as included.
Installation
Confirm chain pitch, shaft spline size, chain alignment and sprocket-retainer arrangement before fitting. Inspect the drive chain and rear sprocket for wear and replace worn drivetrain components as required.