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or JE Forged Piston Kit* with hi-temp rings
9X-TIHD 82-83550
or Wossner forged piston
we provide a complete package designed to restore your engine's performance and significantly increase displacement to approximately 416cc
XR400 XR 400R 89mm Big Bore Kit +4 Cylinder Hi Comp Top End Rebuild Stage 3 Cam YZ400F or JE Forged Piston Kit*Upgrade your Honda XR400R or TRX400EX with an 89mm big bore top end rebuild kit featuring a forged piston, Stage 3 Hot Cams camshaft and Cometic MLS gaskets. Honda XR400 XR400R 400EX 400X 89mm +4 Big Bore Cylinder Hi Compression Top End Rebuild Kit Stage 3 Hot Cams Product Description Transform your Honda engine with this 89mm +4 Big Bore Top End Rebuild Kit featuring a brand new aftermarket cylinder, a forged Wiseco or CP Carrillo high compression
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