TRX 400EX 400X Big Bore 89mm 10:1 Piston Kit Top End Gasket Cometic Head Gasket

FITS ALL HONDA 400EX 400X XR400R YEARS AND MODELS!! Standard Aftermarket 89mm 10:1 piston Piston rings Wristpin Circlips Top end gasket kit COMETIC 89mm MLS Head Gasket H0402027S NGK Spark Plug DPR8Z Fits all 89mm 400EX cylinders Runs on pump or race gas This is a standard kit with all aftermarket parts.  It is an inexpensive way to replace the piston on your 400EX big bore.  If you are looking for a higher quality kit that comes with different parts see our other listings.BPRATV - The Best Parts. The Best Performance. The Best Price. BRAPPPPPPPPPP!