Hoca 250cc Roller Weights Axles Intake Manifold for 50cc 4-stroke

Intake Manifold for 50cc 4-stroke QMB139 engines

Replaces Yuasa part numbers YB12AA

Specifically covers the following models: Chinese made 50-250cc scooters including the QMB139 4-stroke engine and 125-150cc GY6 Engines Aprilia SR50 1994-1999

Hoca Water Pump Housing

Hoca 250cc Roller Weights Axles Intake Manifold for 50cc 4-strokeHoca Roller Weights for 250cc water cooled 172mm engines. Commonly found on 250cc water cooled Chinese scooters, CFMoto V3 and V5 motorcycles and much more. 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. Please see our