BOLD MAGENTA part numbers are new for 2025 PISTON & PISTON KITS PARTS-UNLIMITED.COM ATV/UTV | 2025 PISTON & PISTON KITS 1077 HIGH-PERFORMANCE PISTONS (CONT) FITS MODEL STOCK BORE X STROKE (MM) BORE SIZE (MM) OVERIZE (MM) DISPLACEMENT (CC) COMPRESSION RATIO PISTON PART # PK KIT PART # RING SET PART # CIRCLIP PART # WRIST PIN PART # TOP-END BEARING PART # YAMAHA (4-STROKE) (CONT) YFZ450 06-13 (except YFZ450R/X) 95 x 63.4 98.0 3.00 478 12.5:1 0910-2845 - - CW20 - - ArmorGlide skirt coated (big bore cylinder required) YFZ450 06-13,YFZ450X 11, YFZ450R 09-24 95 x 63.4 95.0 STD 449 11.4:1 0910-1668 - - - - - ArmorGlide skirt-coated YFZ450 06-13,YFZ450X 11, YFZ450R 09-24 95 x 63.4 95.0 STD 449 12.4:1 0910-0393 - - CW20 - - YFM550 Grizzly 09-13 92 x 84 92.0 STD 558 10.25:1 0910-4169 - - - - - YFM600 Grizzly 98-01 95 x 84 95.0 STD 598 Stock 0910-0004 0903-0314 3740XH - - - 96.0 1.00 4797M09600 0903-0356 - 97.0 2.00 0910-0286 0903-0315 - YFM660R Raptor 01-05 100 x 84 100.0 STD 660 9.9:1 0910-2859 0903-0621 - - - - ArmorGlide skirt-coated 100.5 0.50 0910-2860 0903-0622 - 101.0 1.00 0910-2861 - - 102.0 2.00 0910-2862 - - YFM660R Raptor 01-05 100 x 84 100 STD 660 11:1 4737M10000 0903-0357 - - - - ArmorGlide skirt coated 100.5 0.50 4737M10050 - - YFM660R Raptor 01-05 102 x 84 102 2.00 686 11:1 0910-0287 - - - - - ArmorGlide skirt coated YFM660F Grizzly 02-08, 100 x 84 100.0 STD 660 9.9:1 0910-2859 0903-0625 - - - - YXR660F Rhino 660 05-07 100.5 0.50 0910-2860 0903-0626 - 101.0 1.00 0910-2861 0903-0627 - 102.0 2.00 0910-2862 - - YFM660F Grizzly 02-08, 100 x 84 100.0 STD 660 11:1 4737M10000 - - - - - YXR660F Rhino 660 05-07 100.5 0.50 4737M10050 - - YFM660F Grizzly 02-08, 102 x 84 102.0 2.00 686 11:1 0910-0287 - - - - - YXR660F Rhino 660 05-07 ArmorGlide skirt coated YFM700R Raptor 06-14 102 x 84 102.0 STD 686 9.2:1 0910-0859 0903-0499 - - - - ArmorGlide skirt coated - Nikasil Bore – cylinder sleeving or replating required for oversizes YFM700R Raptor 06-14 102 x 84 102.0 STD 686 11:1 0910-0861 - - - - - ArmorGlide skirt coated - YFM700 Grizzly 07-13, 102 x 84 102.0 STD 686 9.2:1 0910-0859 0903-0508 - - - - YXR700 Rhino 08-13 103.0 1.00 700 - 0903-0619 - ArmorGlide skirt coated YFM700 Grizzly 07-13, YXR700 Rhino 08-13 102 x 84 102.0 STD 686 11:1 0910-0861 - - - - - ArmorGlide skirt coated YFM700F Grizzly 14-15, YFM700 Kodiak 19-25 102 x 84 102.0 STD 686 10:1 0910-3931 - - - - - YXM7 Viking 700 14-25 700 Raptor 15-25 YXE700R Wolverine R-Spec 16-17, 103 x 85 103.0 STD 708 11:1 0910-4178 - - - - - YFM700F Grizzly 16-18, YFM700 Kodiak 16-18 ArmorGlide skirt coated REPLACEMENT WRIST PIN DIMENSIONS PART # OD/LENGTH S-256 16 mm/2.050” S-257 18 mm/2.200” S-270 16 mm/1.840” S-278 18 mm/2.475” S-376 19 mm/2.500” S-459 18 mm/1.850” PART # OD/LENGTH S-482 18 mm/1.948” S-484 18 mm/2.291” S-486 16 mm/2.175” S-508 18 mm/2.1062” S-512X 20 mm/2.362” S-513 18 mm/2.300” PART # OD/LENGTH S-522 15 mm/2.200” S-523 17 mm/2.430” S-529 21 mm/2.755” S553 12 mm/1.5354” S591 23 mm/2.126” REPLACEMENT CIRCLIPS DIMENSIONS PART # SIZE CW12 12 mm CW13 13 mm CW14 14 mm PART # SIZE CW15 15 mm CW16 16 mm CW17 17 mm PART # SIZE CW18 18 mm CW20 20 mm CW21 21 mm PART # SIZE CW23 23 mm CW24 24 mm TOP END BEARING DIMENSIONS PART # DIMENSIONS (MM) 0924-0124 20 x 25 x 21.8 B1000 12 x 16 x 16 B1002 18 x 23 x 24 B1003 18 x 22 x 22 PART # DIMENSIONS (MM) B1005 16 x 21 x 23 B1008 16 x 21 x 19.5 B1014 18 x 23 x 22 B1016 16 x 20 x 19.5 PART # DIMENSIONS (MM) B1021 16 x 20 x 22.5 B1022X 18 x 22 x 23.6 B1023 20 x 25 x 25
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