GOOFIT
7-Tooth Kick Start Shaft Gear Kit for GY6 49cc 50cc 80cc 100cc 139QMB Scooter Moped
7-Tooth Kick Start Shaft Gear Kit for GY6 49cc 50cc 80cc 100cc 139QMB Scooter Moped
4.89 / 5.0
(19) 19 total reviews
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Product Overview
Restore your scooter's ignition reliability with the GOOFIT High-Performance 7-Tooth Kick Start Gear Kit. Specifically designed for the ubiquitous GY6 49cc to 100cc (139QMA/139QMB) engines, this kit is the perfect fix for slipping, grinding, or seized kick starters.
Constructed from premium high-strength alloys and subjected to a specialized heat treatment process, this gear kit is engineered to handle the high loads of daily start-ups. By replacing your worn factory components with this GOOFIT kit, you will experience reduced starting resistance and faster engine rotation, ensuring a smooth transition from standstill to startup every time.
Product Compatibility
Direct replacement for 4-stroke 139QMB / P139QMB engines. Fits most Chinese scooter brands.
| Engine Type | Displacement | Popular Brands |
| GY6 4-Stroke | 49cc, 50cc, 80cc, 100cc | Taotao, Roketa, Jonway |
| Engine Code | 139QMA / 139QMB / P139QMB | Peace Sports, Wolf, Ice Bear |
| Vehicle Type | Gas Scooters, Mopeds | Bintelli, Gator, SunL |
Specifications
Precision measurements to ensure a perfect fit inside your CVT cover.
| Feature | Detail |
| Number of Teeth | 7 Tooth |
| Shaft Length | 51mm (2") |
| Spline Shaft Diameter | 13mm (0.51") |
| Shaft Diameter (Body) | 10mm (0.40") |
| Material | Heat-Treated High-Strength Steel |
| Performance | Anti-Wear & High-Impact Resistance |
Key Features
- Heat-Treated Durability: Selected high-strength materials undergo a rigorous heat treatment to enhance surface hardness. This significantly improves wear resistance, allowing the gears to maintain peak performance even under high-load start-ups.
- Smooth Start-Up Engineering: Say goodbye to frustrating starting issues. This gear effectively reduces mechanical resistance, accelerating engine rotation for a quicker, more reliable ignition process
- Extended Service Life: By focusing on impact resistance, this kit reduces the internal friction that leads to component failure, saving you the cost and hassle of frequent maintenance.
- OEM Precision Fit: Designed with the exact dimensions (51mm length, 13mm splines) of the standard GY6 starter gear, ensuring a "drop-in" installation without the need for modifications.
- Comprehensive Starting Solution: Ideal for riders noticing a "loose" kick pedal or hearing a grinding noise when trying to start their scooter.
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Fitment FAQ
Will this part fit my specific model and year?
This replacement part is intended for Direct replacement for 4-stroke 139QMB / P139QMB engines. Fits most Chinese scooter brands.; Engine Type; Displacement; Popular Brands; GY6 4-Stroke; 49cc, 50cc, 80cc, 100cc; Taotao, Roketa, Jonway. Key physical/spec details from the product data include Number of Teeth: 7 Tooth, 7 Tooth, Shaft Length: 51mm (2"). 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 replacement part, also compare the OEM number, dimensions, connector or mounting style, engine/model year, and product photos. This is especially important for GY6/Roketa/TaoTao 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 replacement part for machines outside the listed compatibility, or for units with different OEM numbers, dimensions, mounting points, connectors, or year-specific configurations. 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, dimensions, connector or mounting style, engine/model year, and product photos. Recheck listed specs such as Number of Teeth: 7 Tooth, 7 Tooth, Shaft Length: 51mm (2"). If any connector, mounting point, size, or year detail is different, confirm fitment before installation.
Used few of your parts to put together a used tao tao for my daughter love the quality and priceAny way can share a pix of her riding she is 3 lol
Perfect fit
This GOOFIT Start Gear for GY6 50cc 60cc 80cc 139qmb Scooters Moped came packaged nice in a compact box sealed good, the actual parts was sealed in a ziploc bag and included a company card with contact information in case of any product issues which i found to be nice although i did not order this for myself i am sure my nephew will find this helpful if he runs into any problems putting this on his scooter in the future.These pieces was greased and ready to be put in and from what my husband says is good, that saves on my nephew having to do this himself. He also went on to say as far as he could see that the pieces appear to be in good working condition although that cannot be determined until the parts are actual put on and used but visually they appear in good condition.My nephew is always replacing something on his scooter so when i was offered this at a discounted price i decided to accept it, parts can really run into a lot of money. I will update once he puts this piece on to let you know how well it actually works.As i mentioned above i received this at a discounted price in exchange for a honest and unbiased review and that is what i have provided based on my examination of this product.
Works perfectly installed no issues works just fine
Had a rough beginning but they worked with me to resolve all problems/misunderstandings highly recommended for anyone looking for parts. Best encounter on Amazon yet. Hands down! Thank you!