Product Details
Description
Reduction Gear (Starter); GY6, Chinese
Key Details
- Original Parts For Scooters SKU: 164-123
Replacement Part Details
Use this part when the original component is worn, damaged, missing, or no longer working correctly. Many scooter parts can look similar but use different sizes, plugs, brackets, thread patterns, or mounting styles, so careful comparison before purchase is recommended.
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: GY6
- Fitment Notes: Clone / Chinese
Fitment Guide: This compatibility information is based on manufacturer and supplier data. Listed models are common known applications and may not include every compatible scooter. If your scooter has multiple versions or production changes, confirm the correct match before ordering. Check photos, measurements, original part numbers, engine code, model, and related fitment information whenever possible.
Common Fitment Questions
Q: Is this for GY6 scooters?
A: This SKU is listed with GY6 engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 0.312 lbs |
|---|---|
| Dimensions | 4 × 4 × 1.5 in |
Starter reduction gear for GY6 125-150cc engines.
Original Parts For Scooters SKU 164-123
- Inner Diameter: 10mm
- Number of Teeth (top gear): 17 teeth
- Number of Teeth (bottom gear): 49 teeth
157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes:
| 157QMJ | 161QMK | 152QMI | 1P61QMK |
| YN1P57QMJ | 1P52FMI | 154FMI | JJ157QMJ |
| 1P57QMJ | BN157QMJ | BN161QMK-A | Other QMJ, QMK, and QMI models |
Don't see your engine listed? If the engine code includes "QM" or "FM", this product is compatible with your vehicle.
About Scooterworks: Since our beginning in 1989, Scooterworks has become a major supplier of parts and accessories for vintage and modern scooters. We have everything you need, from wear-and-tear items like tires and oil filters to after-market parts from brands like Malossi, NCY, Prima, YSS, Dr. Pulley, and more.





