Full upgrade kit to replace the stock softer top cap and collets found on the lifan and other 150 engines
1 x Harden valve inlet
5.3mm stem
Head 30.5mm
Length 88mm
1 x Harden valve
Exhaust
5.3mm stem
Head 25.8mm
Length 88mm
2 x Harden valve top caps
4 x harden valve colletts