Compatible with various engine sizes ranging from 50cc to 250cc for 4-stroke dirt bikes, pocket bikes, and mini bikes. Complete Throttle Grip Assembly for 50cc-250cc Dirt Bikes. Experience a seamless ride with our Lightweight & Durable Throttle Grip Assembly, designed specifically for Mini Bike/Pocket Bike/Dirt Bike/Go Kart or 4-Stroke Pit Dirt Bike Motorcycle Motocross enthusiasts.