Product Description
GY6 125cc / 150cc Countershaft Assembly (13T / 42T)
Restore your GY6 transmission with this OEM-style countershaft assembly designed for most GY6 125cc and 150cc engines. Manufactured to original specifications, this shaft features a factory 13-tooth drive gear and 42-tooth driven gear, making it an ideal replacement for worn, chipped, or damaged transmission components. Properly functioning transmission gears help ensure smooth power transfer, reliable acceleration, and long service life.
Specifications
- Large Gear Teeth: 42
- Small Gear Teeth: 13
- Shaft Diameter: 15mm
- OEM-Style Replacement
- Pre-assembled Countershaft
Features
- Direct replacement for most GY6 125cc and 150cc transmissions
- Restores smooth and reliable power transfer
- Precision-machined gear teeth for long service life
- Ideal for repairing worn, damaged, or noisy transmissions
- OEM-style fit and function
Compatibility
Fits many GY6-based engines, including:
- 125cc GY6 (152QMI)
- 150cc GY6 (157QMJ)
- Many 161QMK, 152QMI, 1P61QMK, and similar GY6 engine variants
Important Fitment Notice:
This countershaft may not fit some of the newer GY6 QMK engine variants due to differences in transmission design. Please compare the gear tooth count, shaft diameter, overall dimensions, and your original part before purchasing. Not all GY6-based engines use identical transmission components. Matching your existing part is the best way to ensure proper fitment.
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