Dr. 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 performance. With Dr. Pulley, no abnormal wear will occur even when running in high gear.
Please see our Warranty & Returns Policy.
The Surprise Super Sale Enter Coupon Code 'SAVERIGHTNOW' Or 'FREESHIPPING' At Checkout Today
Our personal shoppers love speaking and chatting with you. Click the button below to chat live or to be connected toll free for personal shopping assistance via telephone. You can also dial 1-800-350-5420 or click to chat.
have arrived so gas scooters are on sale. Electric
are now being featured. Buy hot toys
and hobbies like Ride On Cars
for kids with parental remote control, RC Helicopters
, Nitro Rc Cars
, RC Cars
, RC Planes
, RC Submarines
, RC Toys
, and RC boats
. Motorized Scooters
, Mini RC
, and Toy Robots
are a hot trend at toy stores
. Wholesale Toys
for stores are available for purchase. Shop cool toys for sale at our online Toy Stores