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Kick Start Gear Shaft Assembly Kit for GY6 50cc 60cc 80cc 139QMB Scooter Moped
Kick Start Gear Shaft Assembly Kit for GY6 50cc 60cc 80cc 139QMB Scooter Moped
4.7 / 5.0
(27) 27 total reviews
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Product Overview
Restore your scooter's manual starting power with this Complete Kick Start Gear Shaft Kit. Specifically designed for the small-case GY6 4-stroke engine family (50cc–80cc), this kit replaces worn or stripped gears that cause the kick pedal to slip or jam. Featuring a precision-cut 7-tooth gear and a high-strength spline shaft, this assembly is engineered for durability and ease of use. Whether your battery is dead or you prefer a manual start, this high-quality combination ensures a smooth, reliable engagement every time you kick the pedal.
Product Compatibility
| Component Type | Specification |
| Engine Type | GY6 4-Stroke (139QMB / 1P39QMB) |
| Engine Displacement | 50cc, 60cc, 80cc |
| Vehicle Types | Scooters, Mopeds, Mini-Bikes |
| Common Brands | TaoTao, Peace Sports, Ice Bear, Wolf, VIP, Roketa, Jonway |
| Fitment Note | Specifically for 7-tooth starter systems |
Specifications
| Feature | Details |
| Shaft Length | 65mm (2.56") |
| Spline Diameter | 14mm (0.55") |
| Gear Tooth Count | 7-Tooth |
| Material | Heavy-Duty Hardened Steel Alloy |
| Condition | 100% Brand New Combination Kit |
Key Features
- Precision 7-Tooth Design: Engineered specifically for the GY6 139QMB engine, the 7-tooth gear ensures a perfect mesh with the kickstart idle gear, preventing slipping and reducing wear on internal components.
- Hardened Steel Construction: Manufactured from high-quality, impact-resistant materials designed to withstand the sudden force of manual kicking without bending or shearing the splines.
- Optimized Shaft Dimensions: With a 65mm length and 14mm spline diameter, this shaft provides a precise fit for standard 50cc scooter crankcase covers, ensuring "lossless" installation.
- Smooth Engagement: The brand-new gear combination is designed to reduce friction and resistance, making it easier for riders to start their motor with minimal effort.
- Complete Starting Solution: This kit replaces the most common failure point in the manual start system, providing a durable alternative to stock components that have succumbed to metal fatigue.
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Fitment FAQ
Will this part fit my specific model and year?
This gearbox assembly is intended for GY6 50cc 60cc 80cc 139QMB Scooter Moped. Key physical/spec details from the product data include Specifically for 7-tooth starter systems, Shaft Length: 65mm (2.56"), Spline Diameter: 14mm (0.55"). 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 gearbox assembly, also compare the chain size, tooth count, shaft diameter, case style, sprocket alignment, and 2-stroke/4-stroke engine type. This is especially important for GY6 GY6 models because similar model names can use different parts by year or trim.
What models or situations does this part not fit?
Do not order this gearbox assembly for machines outside the listed compatibility, or for units with different chain sizes, shaft diameters, tooth counts, sprocket alignment, or case styles. 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 chain size, tooth count, shaft diameter, case style, sprocket alignment, and 2-stroke/4-stroke engine type. Recheck listed specs such as Specifically for 7-tooth starter systems, Shaft Length: 65mm (2.56"), Spline Diameter: 14mm (0.55"). If any connector, mounting point, size, or year detail is different, confirm fitment before installation.
replaced my striped out kick gear on my passport z moped scooter
Good product but it didn't fit a Meitian MT50QT-13 Shaft was too long. They should put the length of the shaft in the description.
Great starter and even better customer service.
A really good price for all the stuff you need when you bind up your kick starter, and you will eventually do that. It's really easy to replace all this stuff, the only hard part is that the engine has to come out of the bike just to remove the crankcase cover to get to it.
arrived on time I liked the fact that the Moon gear shaft is little longer than the OEM ( therefore when you kick start it the peg doesn't rub the housing )