Dr. Pulley 16x13 Sliding Roller Weights ADAracing TB60 Cylinder for 50cc 2-stroke

TB60 Cylinder for 50cc 2-stroke 1DE41QMB engines

These handlebars attach to a heavy base piece that they pivot on and bolt to with a heavy thumbscrew

Left Crankcase for 50cc 2-stroke 1DE41QMB engines

Set of (2)

Dr. Pulley 16x13 Sliding Roller Weights ADAracing TB60 Cylinder for 50cc 2-strokeDr. Pulley 16x13 Sliding Roller Weights for 50cc 4 stroke QMB139 engines. Please select weight from drop down menu. Traditionally, gear ratio is changed by the up and down rolling movement of the roller weights in the ramp of the Moveable Drive Pulley (MDF). Now the innovative Dr. Pulley Sliding Roller Weights slide up and down the ramp to change the gear ratio. This unique sliding movement (not rolling) provides exclusive advantages to increase CVT