![Roller Weights Hoca 16x13 QMB139 for WOLF RX50 > Part #169GRS149](http://grand-rapids-scooter.myshopify.com/cdn/shop/products/Grand-Rapids-Scooter-Michigan-Mopeds-Roller-Weights_b2fc00d2-5b80-446e-ad79-7ca464852c30_large.jpg?v=1498150776)
Roller Weights Hoca 16x13 QMB139 for WOLF RX50 > Part #169GRS149
Grand Rapids Scooter
Transmission Parts
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.
Heavier roller weights= A slower take off speed with more acceleration and a higher top speed.
Lighter roller weights = A faster take off speed with less acceleration and lower top speed.
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