Fan Wheel (front pulley) GY6 139QMB/QMA / Kymco 4T

Plastic front pulley for the variator of GY6 50cc engines 139QMB/QMA. Drive belt failures are often due to excessive heat in the variator area, so it pays to replace the variator fan wheel already at the first signs of damage. Also suitable for Kymco 50cc 2-stroke and 4-stroke engines.

• Brand: GY6
• SKU: OE-GY6BT12019
• Availability: In stock

Notes and Safety CVT PulleysPulleys are an integral part of the CVT system on scooters and mopeds with automatic CVT transmission. The continuously variable transmission consists of fixed and moving pulleys, the V-belt rises and falls between them depending on the engine speed, changing the speed of the vehicle.When should you change a pulley?There are two reasons for replacing pulleys:Wear and tear. Although pulleys are relatively durable, the constant sliding of the V-belt can deform the surface.Tuning. Different pulley angles and diameters can improve the handling of scooters or mopeds.Note: A CVT variator can only do a good job when CVT pulleys as well as torque drive pulleys are compati