This set of Cardinals performance valve springs are suitable for racing high RPM Yamaha engines with high-lift performance camshafts, cylinder heads with larger valves installed. These valve springs are available in 2 hardness ratings, Stage 2 spec for 62-65mm and stage 3 spec for 65mm and above big bore cylinder kits .
- Valve Spring size: 42.5mmx19.6mmx3mm
- Valve Stem size: 4.5x85mm
Yamaha LC135/Jupiter MX/Crypton X/Spark/Exciter/YZF-R15/R125/Fz150i/Vixion