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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
Std Bore: 95mm
Piston
Kit #		 Disp. Bore
Size		 Over
Size		 Comp
Ratio		 Gram
Wt (g)		 Skirt
Style		 Ring # Pin # Lock # Gasket # Sleeve # Footnote
247625 449cc 95mm STD 12.8:1 287 FSR XS9500 708-2050-16-93C 708-050-MW OEM 4
247626 449cc 95mm STD 13.5:1 288 FSR XS9500 708-2050-16-93C 708-050-MW OEM 4
247627 468cc 97mm +2mm 13.0:1 299 FSR XS9700 708-2050-16-93C 708-050-MW JC3064 M,4
247942 478cc 98mm +3mm 13.0:1 288 FSR XS9800 708-2050-16-93C 708-050-MW JC3068 4
262519 498cc 100mm +5mm 12.5:1 315 FSR XS10000 708-2050-16-93C 708-050-MW Call M,4


2005-2009 YZ450F/WR450F PRO Series - 3 Ring
Std Bore: 95mm
Piston
Kit #		 Disp. Bore
Size		 Over
Size		 Comp
Ratio		 Gram
Wt (g)		 Skirt
Style		 Ring # Pin # Lock # Gasket # Sleeve # Footnote
274183 449cc 95mm STD 12.8:1 257 FSR XS9500 708-2050-16-93C 708-050-MW OEM
274184 449cc 95mm STD 13.5:1 260 FSR XS9500 708-2050-16-93C 708-050-MW OEM


2005-2009 YZ450F/WR450F PRO Series - 2 Ring
Std Bore: 95mm
Piston
Kit #		 Disp. Bore
Size		 Over
Size		 Comp
Ratio		 Gram
Wt (g)		 Skirt
Style		 Ring # Pin # Lock # Gasket # Sleeve # Footnote
261544 449cc 95mm STD 12.8:1 246 FSR ZS9500 708-2050-16-93C 708-050-MW OEM 4
261545 449cc 95mm STD 13.5:1 248 FSR ZS9500 708-2050-16-93C 708-050-MW OEM M, 4

- Denotes part # has been issued a new part #. A list referencing old part #s to their new counterparts will be available shortly.

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