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YZ450F 2005-2009 / WR450F 2005-2015

  • 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
YZ450F 2005-2009 / WR450F 2005-2015
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 OEM 4
247626 449cc 95mm STD 13.5:1 288 FSR OEM 4
247627 468cc 97mm +2mm 13.0:1 299 FSR JC3064 M,4
247942 478cc 98mm +3mm 13.0:1 288 FSR JC3068 4
262519 498cc 100mm +5mm 12.5:1 315 FSR Call M,4


YZ450F 2005-2009 / WR450F 2005-2015 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 OEM
274184 449cc 95mm STD 13.5:1 260 FSR OEM


YZ450F 2005-2009 / WR450F 2005-2015 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 OEM 4
261545 449cc 95mm STD 13.5:1 248 FSR 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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