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2006-2013 YFZ 450 / 2009-2018 YFZ450R

  • 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

  • Designed to fit 2mm oversized valves

  • Pro Series piston shown
2006-2013 YFZ 450 / 2009-2018 YFZ450R
Std Bore: 95mm
Piston
Kit #
Disp. Bore
Size
Over
Size
Comp
Ratio
Gram
Wt (g)
Skirt
Style
Ring # Pin # Lock # Gasket # Sleeve # Footnote
247957 449cc 95mm STD 12.5:1 293 FSR OEM 4
247956 449cc 95mm STD 13.5:1 299 FSR OEM 4
247953 469cc 97mm +2mm 13.0:1 308 FSR Call 4
247952 478cc 98mm +3mm 13.0:1 316 FSR Call 4


2006-2013 YFZ 450 / 2009-2018 YFZ450R (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
284685 449cc 95mm STD 12.5:1 258 FSR XS9500 787-2050-16-93C 787-050-MW OEM 4
274209 449cc 95mm STD 13.5:1 260 FSR XS9500 787-2050-16-93C 787-050-MW OEM 4
325022 468cc 97mm +2mm 12.5:1 283 FSR XS9700 787-2050-16-93C 787-050-MW 4, M
325023 468cc 97mm +2mm 13.5:1 285 FSR XS9700 787-2050-16-93C 787-050-MW 4, M
325024 478cc 98mm +3mm 12.5:1 285 FSR XS9800 787-2050-16-93C 787-050-MW 4, M
325025 478cc 98mm +3mm 13.5:1 287 FSR XS9800 787-2050-16-93C 787-050-MW 4, M


2006-2013 YFZ 450 / 2009-2018 YFZ450R (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
261555 449cc 95mm STD 13.5:1 250 FSR ZS9500 787-2050-16-93C 787-050-MW OEM 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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