UMA Racing camshafts are ideal for plug and play use on stock and mildly modified (Stage 1) motors, even better when used together with their big bore kits. More lift and duration to each rotation cycle allows for more combustion. Each camshaft is CNC hardened iron made with a focus on low noise and long usage life. Like all quality camshafts for the Yamaha engine, this one is made with a decompression pin to allow for easy starting. This high-cam performance camshaft will fit Yamaha T135 Jupiter MX/Sniper/Crypton X/Spark/Exciter underbones.