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Upgrade your Honda CRF250R or CRF250RX with the Athena Big Bore Cylinder & Piston Kit and experience the thrill of unmatched performance on every ride
YZ250 engine cylinder head replacement for 72mm big bore builds designed for durability and performance gains
If it can not be fixed we will replace it
Complete Engine bearing kit - includes everything
83mm Wiseco forged big bore piston
Honda CRF450R Kibblewhite Black Diamond Valves KP RED Viton Seals Kit 2013-2016 Shadow ACE VT750 Upgrade your Honda CRF250R or30 31616, 30 31612, 14711 MEN A30, 14721 MEN A70, 12209 GB4 682, 30 31600, 30 31580,Unlock power in your 13 16 Honda CRF450R with Kibblewhite BLACK Diamond Intake Exhaust Valves & RED Viton Seals. Replaces OEM (14711 MEN A30, etc.), requires Kibblewhite springs (30 31250). Race ready, better than OEM, Made in USA for high RPM reliability. 13 16 CRF450R Kibblewhite Head Intake Exhaust Valves & Seals Set Unlock True Power: Elevate Your CRF450R with High