12-Tooth ATV Starter Motor – Reliable Starting for 50cc–125cc Chinese Engines
Is your ATV failing to start at the turn of the key? In most cases, a faulty starter motor is to blame. If you have a Chinese-manufactured 50cc to 125cc single-cylinder engine—whether it’s on an ATV, quad, go-kart, pit bike, or dirt bike—this 12-tooth starter motor is a direct-fit replacement, requiring no modifications to your wiring or frame.
Note: Before placing your order, please verify the number of teeth, the distance between the mounting holes, and the connector type of your original starter motor. Checking these details ensures a perfect fit.
Why choose this starter motor? (Key Benefits):
- Broad Compatibility — Designed for 50cc, 70cc, 90cc, 107cc, 110cc, and 125cc Chinese-style engines without the need for custom adaptors.
- Standard 12-Tooth Pinion — Ensures precise engagement with the starter ring gear on most engines in this category, preventing slippage or premature wear.
- Versatile Mounting — Supports 70mm and 80mm centre-to-centre mounting distances to accommodate various engine configurations.
- Drop-in Installation — A straightforward replacement that takes roughly 15–20 minutes, with no frame or electrical system modifications required.
- Built for Off-Road — Features a robust metal housing designed to withstand the vibrations, dust, and shocks typical of off-road terrain.
Details and Performance
This starter motor operates on 12V DC, the standard voltage for all electrical systems in this vehicle category. The 12-tooth pinion engages directly with the starter ring gear, delivering the necessary torque to turn the engine over without loss of power. The durable metal casing protects the rotor and brushes from dust and moisture, which are common issues in off-road environments. The electrical connectors are standardised for Chinese-style horizontal and vertical engines, meaning no additional cables or adaptors are needed.
| Parameter | Specification |
|---|---|
| Pinion Tooth Count | 12 |
| Mounting Hole Spacing (centre-to-centre) | 70mm / 70mm / 80mm |
| Operating Voltage | 12V DC |
| Engine Compatibility | 50cc, 70cc, 90cc, 107cc, 110cc, 125cc |
| Compatible Engine Types | Chinese single-cylinder (ATV, Quad, Go Kart, Pit Bike, Cross) |
| Installation Type | Direct replacement (drop-in) |
Package Contents
- 1x 12-Tooth ATV Starter Motor
Frequently Asked Questions
Which vehicles is this starter motor compatible with?
It is compatible with ATVs, quads, go-karts, pit bikes, and dirt bikes equipped with 50cc, 70cc, 90cc, 107cc, 110cc, or 125cc Chinese single-cylinder engines. If your engine falls within this range and uses a 12-tooth pinion, this part is suitable.
How can I be sure it will fit my engine?
Check three key factors: the tooth count of your original pinion (must be 12), the distance between the mounting holes (70mm or 80mm centre-to-centre), and the electrical connector type. We recommend comparing your original part with the product images before ordering.
Do I need an electrician or special tools for installation?
No. This is a direct-fit replacement. Simply unbolt the old starter, install the new one, and reconnect the cables. It typically takes 15–20 minutes using standard hand tools.
What if the starter motor doesn’t turn the engine after installation?
First, check your battery; if the voltage has dropped below 11V, the starter will not have enough power to turn the engine. Also, inspect your starter relay and ignition fuse before assuming the starter motor itself is the issue.
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