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12251-HN1-003 OE Part Numbers 5 12391-KCY-671
installation of +1mm oversize valves typically requires the valve seats to be professionally cut to accommodate the larger diameter
Head and crankcase gaskets
Stronger Rides — OEM Direct Fit
Honda TRX 400EX 400X 426 88mm Wiseco Big Bore Cylinder Piston Cometic Gasket Set KX450X 12251-HN1-003 OE Part Numbers 54628M08800, C7826, 4606M08800, 8604D300, 4606M08800, 177240, 177239, Upgrade your Honda 400EX, 400X, or XR400R with this Wiseco 88mm 426cc Big Bore Piston & Cometic Gasket Kit. Boosts power, durability, and reliability. Fits all years. Honda 400EX 400X XR400 Wiseco 88mm 426 Big Bore Cylinder Piston Gasket Kit Upgrade Your 400EX, 400X, or XR400R to 426cc Power This complete Wiseco 88mm 426cc Big Bore Kit includes a forged 11: 1 compression piston and a
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US$ 580.50