Yamaha 2005-2009 YZ450F/WR450F
  • Machined from 2618 T6 high tensile forged aluminum
  • Dome/Dish features smooth flowing radii and require no deburring or preparation
  • JE designs are specifically engineered for extreme applications including professional competition
  • Pins, pin fitment, lock and rings included
    • 2005-2009 YZ450F/WR450F
    Piston Kit Disp Bore Size Over Size Comp Ratio Gram Wt Skirt Style Ring Pin Lock Gasket Sleeve
    247625 449cc 95mm STD 12.8:1 287 FSR XS9500 708-2050-16-93C 708-050-MW OEM
    247626 449cc 95mm STD 13.5:1 288 FSR XS9500 708-2050-16-93C 708-050-MW OEM
    247627 468cc 97mm +2mm 13.0:1 299 FSR XS9700 708-2050-16-93C 708-050-MW JC3064
    247942 478cc 98mm +3mm 13.0:1 288 FSR XS9800 708-2050-16-93C 708-050-MW JC3068
    262519 498cc 100mm +5mm 12.5:1 315 FSR XS10000 708-2050-16-93C 708-050-MW CALL
    2005-2009 YZ450F/WR450F PRO Series - 3 Rin
    Piston Kit Disp Bore Size Over Size Comp Ratio Gram Wt Skirt Style Ring Pin Lock Gasket Sleeve
    274183 449cc 95mm STD 12.8:1 250 FSR XS9500 708-2050-16-93C 708-050-MW OEM
    274184 449cc 95mm STD 13.5:1 254 FSR XS9500 708-2050-16-93C 708-050-MW OEM
    2005-2009 YZ450F/WR450F PRO Series - 2 Ring
    Piston Kit Disp Bore Size Over Size Comp Ratio Gram Wt Skirt Style Ring Pin Lock Gasket Sleeve
    261544 449cc 95mm STD 12.8:1 246 FSR ZS9500 708-2050-16-93C 708-050-MW OEM
    261545 449cc 95mm STD 13.5:1 248 FSR ZS9500 708-2050-16-93C 708-050-MW OEM