85mm 397cc STD Bore Cylinder for Honda XR400R 96-04 OEM 12100-KCY-670

  High Performance Cylinder (CY1213B) This Product Complete High-Performance 435cc STD Cylinder The Bore Is 85.00mm Stroke X 70mm The Cylinder Displacement 397cc And Compression 9.1:1 This Product Was Tested To Use All The Aftermarket Pistons And Gasket Kits Ready To Install This Product Does Not Need Any Modifications This Product Is Tested To Exceed Original Equipment Standards And Performance REPLACES OEM PART NUMBER(S) 12100-KCY-670 APPLICATION SPORTRAX 400 HONDA 1999-2008 (TRX400EX) HONDA XR400R 1996-2004