OKO 15x12 Performance Minarelli Roller Weights 12-1/2 x 2-1/4 Fits the 139QMB / QMB139

Fits the 139QMB / QMB139 engine family found in most 50cc 4-stroke Chinese scooters:

It will NOT work with your stock 420 chain

(Please see related items

Material: Tubular Steel

check your jetting and consider adjusting your variator weights to get the most out of the performance gains

OKO 15x12 Performance Minarelli Roller Weights 12-1/2 x 2-1/4 Fits the 139QMB / QMB139EBC Brakes 899 High Quality Brake Shoes with High Friction Linings for increased efficiency. For use on the following models: Vespa Scooters: ET2 50 (97 05 R), LX 50 (05 15 R), S 50 4T 4V (08 15 R), ET4 150 (99 05 R), LX 150 ie (05 15 R), LXV 150 ie (10 15 R), S 150 (08 15 R) Piaggio Scooters: Typhoon 50 SE (06 R), Typhoon 50 2T (10" wheels) (07 09 R) Roller Diameter: 15mm Roller Width: 12mm 40QMB 50cc 2 stroke, Eton, Jalon Jetstar 18, Kymco, Peugeot,