GY6 50cc (139QMB) Long Case 729x17.7x30 CVT Drive Belt
ITEM# TT-23977
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Description
CVT Drive Belt for 139QMB Long Case 50cc Scooters
This CVT drive belt is built for long case 50cc scooters that use the 139QMB engine. It is a straight swap-in replacement, so it lines up correctly and works dependably. Many owners who keep up with their scooters replace this item as part of routine upkeep, and it can be found among the GY6 50cc scooter parts. Its sturdy build suits a range of riding situations.
Build and Design Details
The belt is produced from a specially blended rubber that resists both oil and heat. Fine transverse inner cogs are part of the design and give it anti-static properties, which help with performance and service life. The belt is 729mm long, has a top width of 17.7mm, and uses a 30° groove angle so it matches the scooter's drivetrain.
Signs It Needs Replacing
Checking the CVT drive belt on a regular basis is key to keeping the scooter running well. Cracks, frayed edges, or a belt that has become stiff and no longer bends easily are all indications of wear. If you spot any of these, swapping the belt soon is the best way to avoid harm to the scooter's transmission.
Specifications
- Material: Oil & heat-resistant, anti-static rubber
- Size: 729mm length | 17.7mm top width | 30° groove angle
- Position: CVT drive belt
- Fits: CSC Pug 50 (139QMB long-case GY6 50cc CVT drive belt, 729mm)
Compatibility
Fits:
- CSC Pug 50
- Other GY6 50cc (139QMB) long-case scooters that take a 729x17.7x30 belt
How to choose: Confirm that your engine uses the 139QMB long-case design, then measure your existing belt: 729mm length, 17.7mm top width, and 30° groove angle.
Installation location: Part #6 on the transmission diagram for the CSC Pug 50.
Browse further: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Parts
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