BOLD MAGENTA part numbers are new for 2023 PARTS-UNLIMITED.COM 2023 | OFFROAD PISTON & PISTON KITS 1146 HIGH-PERFORMANCE PISTONS (CONT) FITS MODEL BORE (MM) X STROKE (MM) DISPL. (CC) BORE SIZE (MM) OVER SIZES (MM) PK KIT PART # PISTON PART # REPL. RING SET PART # REPL. CIRCLIPS PART # REPL. WRIST PIN PART # TOP-END BEARING PART # HONDA MOTORCYCLE 4-STROKE (Correct replacement ring style is stamped on dome of piston – Example “C” for XC,“G” for XG and “H” for XH) (CONT) CRF450R 02-08 101 496 101.0 5.00 - - 0912-0121 CW19 0913-0009 - CRF450X 05-17 x 500cc Big Bore 62.1 12.5:1 Compression ArmorGlide skirt coated CRF450R 09-12 96 449 96.0 STD - 0910-2933 0912-0122 CW19 0913-0012 - 12:1 Stock Compression x ArmorGlide skirt coated 62.1 CRF450R 09-12 96 449 96.0 STD - 0910-2934 0912-0122 CW19 0913-0012 - 13:1 High-Compression x ArmorGlide skirt coated 62.1 CRF450X 05-06 96 449 96.0 STD - 4753M09600 0912-0122 CW19 0913-0009 - 11.5:1 Compression x ArmorGlide skirt coated 62.1 CRF450X 05-17 96 449 96.0 STD 0903-0574 0910-0334 0912-0122 CW19 0913-0009 - 12:1 Compression x ArmorGlide skirt coated 62.1 CRF450X 05-17 96 449 96.0 STD - 4755M09600 0912-0122 CW19 0913-0009 - 12.5:1 Hi-Compression x 62.1 CRF450X 05-17 96 449 96.0 STD - 0910-0335 0912-0122 CW19 0913-0009 - 13:1 Hi-Compression x ArmorGlide skirt coated 62.1 CRF450X 05-17 96 449 96.0 STD - 0910-0758 0912-0122 CW19 0913-0009 - 13:5 Hi-Compression. x ArmorGlide skirt coated 62.1 XR500, XR500R 79-82 89 497 89.0 STD - 4117M08900 3504XC CW21 S527 - XL500S/R 79-82 x 89.5 0.5 - 4117M08950 3524XC FT500 82-84 80 90.0 1.0 - 4117M09000 3544XC 10.5:1 Compression XR500 79-82 89 497 89.0 STD - - 3504XC CW21 S527 - XL500 79-82 x 89.5 0.5 - 4163M08950 3524XC FT500 82-84 80 90.0 1.0 - 4163M09000 3544XC 12:1 Compression XR500R 83-84 92 498 92.0 STD - 0910-2903 3622XC CW22 - - Radial Head x 92.5 0.5 - 4330M09250 3642XC 10.25:1 Compression 75 93.0 1.0 - 4330M09300 3661XC XL600R 83-87 100 589 100.0 STD - - 3937XH CW24 - - Radial Head x 101.0 1.0 - 4332M10100 3977XH 11:1 Compression 75 XR600R 85-01 97 591 97.0 STD - 4577M09700 3819XH CW24 - - Radial Head x 97.5 0.5 - 4577M09750 - 9:1 Compression 80 98.0 1.0 - 4577M09800 - *88-90 model has Nikasil Bore - Cylinder sleeving or replating required for oversizes XR600R 85-01 97 591 97.0 STD - - 3819XH CW24 - - Radial Head x 97.5 0.5 - 4366M09750 - 11:1 Compression 80 100.0 3.0 - 0910-0760 3937XH *88-90 model has Nikasil Bore - Cylinder sleeving or replating required for oversizes XR650L 93-21 100 650 100.0 STD - 0910-0337 3937XH CW24 - - 100-101mm 8.7:1 compression x 101.0 1.0 - 4562M10100 3977XH 102.41mm 9:1 compression 82 102.4 2.40 - 0910-0338 - Cylinder boring required for oversizes XR650L 93-17 100 650 100.0 STD - 0910-2939 3937XH CW24 - - 10.5:1 Compression x 101.0 1.0 - 0910-2940 3977XH ArmorGlide skirt coated 82 102.4 2.40 - 0910-2941 - XR650R 00-07 100 644 100.0 STD - 4715M10000 - CW23 - - 10:1 Stock Compression x 82.6 XR650R 00-07 100 644 100.0 STD - 0910-2921 - CW23 - - 11:1 Stock Compression x 102.36 2.4 - 0910-2922 Cylinder boring required for oversizes 82.6
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