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2001-2005 YFM Raptor 660, 2002-2007 Grizzly, 2006-2007 Rhino

  • 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

  • Pro Series piston shown
2001-05 YFM Raptor 660, 02-07 Grizzly
Std Bore: 100mm (Note: Not designed for use with oversized valves)
Note: Will not fit Rhino models, refer to the Pro Series pistons (below) for compatible Rhino applications.
Note: All 105mm bores need to be Sleeved and Cases Machined
Piston
Kit #
Disp. Bore
Size
Over
Size
Comp
Ratio
Gram
Wt (g)
Skirt
Style
Ring # Pin # Lock # Gasket # Sleeve # Footnote
272144 660cc 100mm STD 10.75:1 400 Round OEM
272145 660cc 100mm STD 12.0:1 419 Round OEM
272146 673cc 101mm +1mm 10.75:1 384 Round JC7277
272147 673cc 101mm +1mm 12.0:1 404 Round JC7277
272148 686cc 102mm +2mm 10.75:1 399 Round JC7920*
272149 686cc 102mm +2mm 12.0:1 411 Round JC7920


2001-05 YFM Raptor 660, 02-07 Grizzly, 06-07 Rhino PRO Series
Std Bore: 100mm
Note: All 105mm bores need to be Sleeved and Cases Machined
Piston
Kit #
Disp. Bore
Size
Over
Size
Comp
Ratio
Gram
Wt (g)
Skirt
Style
Ring # Pin # Lock # Gasket # Sleeve # Footnote
261524 660cc 100mm STD 10:01 361 FSR ZV10000 OEM
261525 660cc 100mm STD 11:01 367 FSR ZV10000 OEM
261526 660cc 100mm STD 12:01 380 FSR ZV10000 OEM
261527 686cc 102mm +2mm 10:01 380 FSR XS10200 JC7920
261528 686cc 102mm +2mm 11:01 382 FSR XS10200 JC7920
261529 686cc 102mm +2mm 12:01 402 FSR XS10200 JC7920
261530 727cc 105mm* +5mm 10:01 417 FSR JC7909 4,***
261531 727cc 105mm* +5mm 11:01 412 FSR JC7909 4,***
261532 727cc 105mm* +5mm 12:01 417 FSR JC7909 4,***


2001-05 YFM Raptor 660, 02-07 Grizzly, 06-07 Rhino PRO Series (4mm Stroker)
Std Bore: 100mm
Note: All 105mm bores need to be Sleeved and Cases Machined
Piston
Kit #
Disp. Bore
Size
Over
Size
Comp
Ratio
Gram
Wt (g)
Skirt
Style
Ring # Pin # Lock # Gasket # Sleeve # Footnote
262289 719cc 102mm +2mm 11:01 353 FSR XS10200 866-2050-15-93C 866-063-MW JC7920 *
300111 762cc 105mm* +5mm 11:01 400 FSR JG4401-4135-2 866-2250-15-93C 866-063-MW JC7909 ***

- 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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