GOOFIT
12-Tooth Starter Motor for Chinese 50cc 70cc 90cc 110cc ATV Dirt Bike
12-Tooth Starter Motor for Chinese 50cc 70cc 90cc 110cc ATV Dirt Bike
Couldn't load pickup availability
Product Overview
Restore reliable electric starting performance to your Chinese ATV, dirt bike, motorcycle, or go-kart with this 12-tooth bottom-mount starter motor.
Designed for many compatible Chinese 50cc, 70cc, 90cc, and 110cc horizontal engines, this starter motor is a practical replacement for a weak, worn, damaged, or failed original starter. It helps solve common starting problems such as slow cranking, no-crank failure, intermittent starter engagement, or starter motor burnout.
This unit features a 12-tooth gear, 68 mm / 2.67 in installation hole distance, and 146.5 mm / 5.76 in overall length. Please compare these measurements with your original starter before ordering.
Built for replacement and repair use, this starter motor is designed for dependable performance on small-displacement ATVs, dirt bikes, pit bikes, motorcycles, and go-karts using compatible Chinese engines.
Product Compatibility
| Engine / Platform | Vehicle Type | Engine Size | Application Notes |
|---|---|---|---|
| Chinese Horizontal Engine | ATV / Quad | 50cc | Bottom-mount starter only |
| Chinese Horizontal Engine | ATV / Dirt Bike / Pit Bike | 70cc | Verify 12-tooth gear and 68 mm mounting distance |
| Chinese Horizontal Engine | ATV / Dirt Bike / Go-Kart | 90cc | Fits only when original starter shape and mounting match |
| Chinese Horizontal Engine | ATV / Motorcycle / Go-Kart | 110cc | Common replacement for compatible small Chinese engines |
| Chinese 4-Stroke Horizontal Engine | ATV / Dirt Bike / Go-Kart | 125cc | May fit some models if dimensions match; verify carefully |
OEM / Part Reference
| Reference Type | Details |
|---|---|
| Product Type | Electric Starter Motor |
| Application Style | Chinese bottom-mount / down-mounted horizontal engine |
| Gear Teeth | 12 teeth |
| Common Part Reference | ST01 / I-ST01 style listing |
| OEM Part Number | No confirmed single OEM number |
| Fitment Type | Universal replacement by size, teeth count, and mounting position |
Specifications
| Specification | Details |
|---|---|
| Product Type | Electric Starter Motor |
| Gear Teeth | 12 Teeth |
| Engine Compatibility | Chinese 50cc / 70cc / 90cc / 110cc engines |
| Possible Extended Fitment | Some 125cc Chinese horizontal engines, verify before purchase |
| Mounting Style | Bottom Mount / Down-Mounted Engine |
| Installation Hole Distance | 68 mm / 2.67 in |
| Overall Length | 146.5 mm / 5.76 in |
| Vehicle Type | ATV, dirt bike, pit bike, motorcycle, go-kart |
| Installation | Direct replacement when dimensions match |
Key Features
- 12-tooth starter motor for compatible Chinese small-displacement engines
- Designed for bottom-mount / down-mounted horizontal engine layouts
- Suitable for many 50cc, 70cc, 90cc, and 110cc ATV, dirt bike, motorcycle, and go-kart applications
- Helps restore reliable electric starting and engine cranking performance
- Durable replacement for a weak, worn, rusted, or failed original starter motor
- Built for repair use on common Chinese powersports engines
Share
Fitment FAQ
Will this part fit my specific model and year?
This starter motor is intended for Engine / Platform; Vehicle Type; Engine Size. Key physical/spec details from the product data include Verify 12-tooth gear and 68 mm mounting distance, Gear Teeth: 12 teeth, 12 teeth. Use the compatibility table and product photos together before ordering.
Do I need to match the OEM part number?
Yes. If your original part has a stamped OEM or manufacturer number, match that number first before ordering. For this starter motor, also compare the OEM number, voltage, tooth count, rotation direction, mounting ears, bolt spacing, terminal type, and overall length.
What models or situations does this part not fit?
Do not order this starter motor for machines outside the listed compatibility, or for units with different tooth counts, CW/CCW rotation, mounting ears, terminal locations, or voltage ratings. Do not rely only on the model name or engine size.
What should I check before ordering?
Before ordering, compare your original part with the photos and check the OEM number, voltage, tooth count, rotation direction, mounting ears, bolt spacing, terminal type, and overall length. Recheck listed specs such as Verify 12-tooth gear and 68 mm mounting distance, Gear Teeth: 12 teeth, 12 teeth. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.