- Brake Lever Perch Diameter: 22mm (Please check if the size is compatible before purchasing, the final size is subject to the size shown in the picture) 2. Fit Model:Replacement For most off-road motorcycle, ATV, quad, scooter, go-kart, moped, pit bike, dirt bike, racing bike 3. Replacement for GY6 50cc.80cc, 90cc, 110cc, 125cc, 150cc 4-Stroke Engines, GY6 Clone Engines. Replacement For 139QMB, 1P39QMB, 152QMI, 157QMJ gasoline engines. 4. This clutch lever has a simple installation process, convenient and convenient to use. Selected high quality material, sturdy and durable. Super strength and durability, long lasting use. Its exquisite and smooth lines provide a comfortable and easy control condition for your hand.