GY-6 4 Stroke 50cc BGM PRO Variator (type 139QMB)

Product Code: BD17529

Sold out

Delivery Information

We're pleased to offer FREE UK Delivery on orders placed over £150.00.

Delivery is available Worldwide. See our Delivery Information page for further details.

Returns & Refunds

We're committed to providing a great customer service and wish our customers to be 100% satisfied with purchases. 

Please review our Returns Information or Contact Us if you have any queries.

Payment Security

All our orders are 100% secure. We know this because our e-commerce system is Level 1 PCI compliant and uses 128 bit SSL encryption to ensure credit card data is secure.

Which is the same level of encryption used by large banks around the world. 

GY-6 4 Stroke 50cc BGM PRO Variator (type 139QMB)

The BGM PRO Variomatic de-throttles the drive and allows for a significantly better acceleration as well as a higher final speed.

The roller tracks have been calculated specifically for each model. The sliding surface of the belt is optimized to achieve a better grip. Thanks to the very good gliding properties of the rollers (among other things, the sliding lacquer-coated ascending pulley), this variomatic - completely engine friendly - brings considerably improved values even on standard engines.

Enclosed are 3 weight sets for ideal adjustment to the respective application (original engine, slightly tuned, or already with 70ccm cylinder). The weights can also be mixed for intermediate values, for this purpose always use alternately the weights in the vario (e.g. 5g + 6g + 5g etc.).

All values of the installed weights added together, divided by the number of weights used, result in the (virtual) individual weight (3x 5.0 grams + 3x 6.0 grams = 33 grams / 6 = 5.5 grams).

The BGM PRO Variomatic is optimized in all areas and made of the best materials.
It offers high performance with an outstanding price/performance ratio