Performance 2000 RPM Torque Spring for 50cc QMB139 4-stroke engine based vehicles.
Designed to provide varying pressure to the sliding variator plate for different acceleration purposes and tuning.
When performance increases, these springs become a necessity.
It can maximize your engine's torque and response.
These top performing springs will give you back your acceleration, hill climbing ability and make your machine run as a top performer once again.
This fits all the common scooters, ATV , Go Karts with 50cc QMB139 engines like Tao Tao , Baccio , Vento Phantom R4i, R3, Jonway, NST, Tank, JMstar, Roketa, Sunl, Peace and many more.