GOOFIT
Drive Belt 729-17.5-30 for GY6 50cc 139QMB Long Case Scooter
Drive Belt 729-17.5-30 for GY6 50cc 139QMB Long Case Scooter
4.89 / 5.0
(9) 9 total reviews
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Product Overview
Restore smooth acceleration and reliable CVT power transfer with this 729-17.5-30 drive belt, designed for many GY6 49cc / 50cc 139QMB and 139QMA long case scooter engines.
This belt is commonly used on Chinese scooters and mopeds with long case engines, often found on models equipped with 12-inch or 13-inch rear wheels. It helps transfer engine power from the variator to the clutch assembly, supporting smoother takeoff, better throttle response, and more consistent riding performance.
Made from fiber-reinforced rubber material, the belt is built to handle normal CVT heat, friction, and daily riding conditions. It is a practical replacement for worn, cracked, slipping, or stretched drive belts.
Important: Please check the belt number printed on your original belt before ordering. This belt fits 729-17.5-30 long case applications and does not replace shorter belts such as 669-18-30.
Product Compatibility
| Component | Details |
|---|---|
| Engine Type | GY6 49cc / 50cc 4-Stroke |
| Engine Codes | 139QMB, 139QMA |
| Case Type | Long Case Only |
| Belt Size | 729-17.5-30 |
| Common Wheel Size | Often used on 12" / 13" rear wheel scooters |
| Vehicle Types | Scooters, mopeds, select small ATVs and go-karts |
| Common Brands | TaoTao, Wolf, Ice Bear, Peace Sports, Bintelli, Roketa, and similar Chinese scooter brands |
Fitment Note:
GY6 50cc scooters can use different belt sizes depending on the engine case length and wheel setup. Always compare your original belt size before ordering.
Specifications
| Specification | Details |
|---|---|
| Product Type | CVT Drive Belt |
| Belt Model | 729-17.5-30 |
| Length | 729 mm |
| Width | 17.5 mm |
| Angle | 30° |
| Material | Fiber-Reinforced Rubber |
| Engine Compatibility | GY6 49cc / 50cc 139QMB / 139QMA |
| Case Compatibility | Long Case |
| Installation Position | CVT Transmission / Variator to Clutch |
Key Features
Designed for GY6 50cc Long Case Engines
The 729mm belt length is commonly used on GY6 50cc long case scooter engines, especially models with larger rear wheel setups.
Direct Replacement Size 729-17.5-30
Built to replace worn or damaged 729-17.5-30 CVT belts. Always match this number with the size printed on your old belt.
Fiber-Reinforced Rubber Construction
Made with reinforced rubber material to help resist stretching, cracking, and wear during normal scooter operation.
Smooth CVT Power Transfer
Helps maintain consistent contact between the variator and clutch pulleys for smoother acceleration and better riding response.
Suitable for Daily Scooter Maintenance
A practical replacement part for scooters with belt slip, poor acceleration, vibration, hard takeoff, or visible belt wear.
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Fitment FAQ
Will this part fit my specific model and year?
This drive belt is intended for GY6 50cc 139QMB Long Case Engine. Key physical/spec details from the product data include Total Length: 729mm, Width: 17.5mm, Teeth Angle: 30 Degrees. 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 drive belt, also compare the OEM belt number, belt length, belt width, tooth/profile style, clutch/variator type, and engine model. 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 drive belt for machines outside the listed compatibility, or for units with different OEM belt numbers, belt widths/lengths, clutch sheaves, or CVT profiles. 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 belt number, belt length, belt width, tooth/profile style, clutch/variator type, and engine model. Recheck listed specs such as Total Length: 729mm, Width: 17.5mm, Teeth Angle: 30 Degrees. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.
This brand - two trade marked names, Bandbo and Goofit -I've riden mopeds for the past 4yrs, I live in Hawaii, they're everywhere here as alternative transportation due to traffic problems on island of Oahu. The OTHER BRANDS are JUNK. The competition brands for these Chinese mopeds don't last greater than 200 to 1000 miles. If you are lucky! The make and quality of this particular brand Goofit or Bandbo won't be a bad investment. Worth it! These typically 1 to 2k miles. I do strongly recommend that you also change the Clutch - not OEM. Go race style for extra money. But? You won't be sorry. Rolling weights 5g & 7g x 3 for the varitor as best set up for daily use. Mahalo.
Quality
Just what I needed
Recomendado
perfect fitment for 50cc gy6 moped