Description
Naraku drive belt 139 QMA / QMB
We supply the performance V-belt from Naraku for 139 QMA/QMB, e.g. Baotian 4T, GY6. This V-belt is ideal as a replacement V-belt, but can also be fitted to slightly tuned engines. The Naraku V-belt is characterized by good grip even when the engine is cold, flexibility and durability. However, a short running-in period should be planned before the V-belt has optimum grip.
Technical data scooter belt:
- Compatibility: 139QMB / 139QMA engines, scooters with 10 inch wheels
- Dimensions: 669x18x30mm
- Recommended distance between crankshaft and drive shaft: approx. 22.5 cm
- Recommended use: Standard or lightly tuned engines
Caution: For engines with a more heavily tuned setup, it is advisable to use a reinforced V-belt model. This belt is ideal for anyone looking for reliability and performance for 4-stroke city scooters.
When to change the V-belt?
On scooters, the engine power is transmitted to the rear wheel via the V-belt or drive belt, which connects the CVT variator to the torque drive. As a rule, it should be replaced every 10,000 to 20,000 km. The belt slips when it is heavily worn. By the way, a new belt also slips and needs a short run-in period.
How to change the drive belt?
Replacing the V-belt is a relatively easy, you don't need advanced technical know-how. The first step is to remove the variator cover to get to the variator. You'll need a piston stopper and a blocking tool to remove the CVT and clutch bell. You can then remove the worn V-belt and replace it with the new one. When reassembling, make sure that the V-belt is properly seated and has the correct tension.
Here's a little tutorial on How to change the CVT and drive belt (English Subs).
