Custom Builds and Performance Parts
- Hoca 16x13 QMB139 Roller Weights
Hoca 16x13 QMB139 Roller Weights
Hoca Roller Weights size 16x13 for 50cc 4-stroke QMB139 engines. The QMB139 is the most popular 50cc 4-stroke engine found on Chinese scooters.We recommend starting performance upgrades by changing the variator roller weights first.