Yamaha 90 High Compression Billet Head Kit Dome Size:29cc Domes Approx 250 PSI - (Race Fuel Only) KX500 Clutch Housing Gasket

KX500 Clutch Housing Gasket

Race fuel only)

Platinum Black

2 petal reeds)

Yamaha 90 High Compression Billet Head Kit Dome Size:29cc Domes Approx 250 PSI - (Race Fuel Only) KX500 Clutch Housing GasketTSR Yamaha 90 Billet Engine Head Kit best bolt on mod you can do or your outboard Our billet head kit has increase cooling volume and improved heat dissipation, with the squish clearance being tighter than stock and designed to be more detonation resistant with overall improved power through the whole rev range with multiple dome sizes to choose from to suit both pump and race gas applications This is a direct bolt on kit with no other mods required.