BOLD MAGENTA part numbers are new for 2025 PISTON & PISTON KITS PARTS-UNLIMITED.COM OFFROAD | 2025 PISTON & PISTON KITS 1347 HIGH-PERFORMANCE PISTONS (CONT) HIGH-PERFORMANCE PISTONS continued on next page. 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) XR80R 92-03 47.5 79.7 48.0 0.50 0903-0173 0910-0324 0912-0114 CW13 0913-0005 - CRF80F 04-13 x 48.5 1.00 0903-0174 0910-0325 0912-0115 9.7:1 Compression 45 49.0 1.50 0903-0232 - - 49.5 2.0 - 0910-0327 - XR100R 85-91 53 99.2 53.5 0.5 - 0910-0328 0912-0124 CW14 - - 9.4:1 Compression x 54.0 1.0 0903-0242 0910-0329 0912-0125 45 54.5 1.5 - - 0912-0126 55.0 2.0 - 0910-0331 0912-0127 XR100R 92-03 53 99.2 53.5 0.5 0903-0199 0910-0328 0912-0124 CW14 0913-0006 - CRF100F 04-12 x 54.0 1 0903-0180 0910-0329 0912-0125 9.4:1 Compression 45 54.5 1.5 - - 0912-0126 55.0 2.0 - 0910-0331 0912-0127 XR100R 85-03 58 120 58.00 5.0 - 0910-0752 - CW14 - - CRF100F 04-13 x 12:1 Compression 45 58 mm Big Bore. Cylinder sleeving required for oversizes CRF125F 14-24 52.4 - 53.5 1.1 - - 0912-0124 CW12 - - 10:1 Compression x ArmorGlide skirt coated 57.9 CRF150F 06-17 57.3 - 57.5 - - 0910-3946 - CW14 - - 10:1 High-Compression x 58.0 - 0910-3947 - ArmorGlide skirt coated 57.8 CW18 CRF150R 07-09 66 150 66.0 STD 0903-0688 0910-0819 - - - - Stock compression 11.7:1 x Skirt coated 43.7 CRF150R 07-09 66 150 66.0 STD - 0910-0821 - - - - High-compression x 159 68.0 2.0 - - - 66 mm=12.2:1 CR 43.7 68 mm=12.4:1 CR Skirt coated XR/XL185 + 0.100 Big Bore 86-91 65.5 192 65.5 STD - 4156M06550 2579XC CW15 S-522 - 10:1 Compression x 66.0 0.5 0903-0211 4156M06600 2598XC Cylinder boring required for oversizes 57.8 66.5 1.0 - 4156M06650 2618XC XR/XL185 +0.100 Big Bore 92-02 65.5 192 65.5 STD 0903-0212 4156M06550 2579XC CW15 S-522 - 10:1 Compression x 66.0 0.5 0903-0270 4156M06600 2598XC Cylinder boring required for oversizes 57.8 66.5 1.0 0903-0201 4156M06650 2618XC XR200 to 83 65.5 192 65.5 STD 0903-0231 4156M06550 2579XC CW15 S-522 - 10:1 Compression x 66.0 0.5 0903-0172 4156M06600 2598XC 57.8 66.5 1.0 0903-0235 4156M06650 2618XC CRF230F 03-19 65.5 223 65.5 STD - 0910-0332 - CW15 - - x 11:1 Compression 66.2 CRF250R 04-07 78 249 78.0 STD 0903-0553 0910-0333 0912-0120 CW16 0913-0008 - CRF250X 04-17 x 12.9:1 Standard Compression 52.2 CRF250R 04-07 78 249 78.0 STD 0903-0551 0910-0756 0912-0120 CW16 0913-0008 - CRF250X 04-17 x 13.5:1 High-Compression. 52.2 ArmorGlide skirt coated CRF250R 04-09 78 276 82 4.00 - 0910-2938 - CW16 0913-0008 - 13.5:1 Compression x 276cc Big Bore Kit 52.2 ArmorGlide skirt coated CRF250R 08-09 78 249 78.0 STD - - 0912-0120 CW16 0913-0008 - 13.1:1 Stock-Compression x ArmorGlide skirt coated 52.2 CRF250R 08-09 78 249 78.0 STD - - 0912-0120 CW16 0913-0008 - 13.6:1 High-Compression x ArmorGlide skirt coated 52.2 CRF250R 10-13 76.8 249 76.8 STD 0903-0940 0910-2886 - CW16 0913-0008 - 13.2:1 Stock Compression x ArmorGlide skirt coated 53.8 CRF250R 14-15 76.8 - 76.8 STD 0903-1137 - - CW16 0913-0008 - 13.5:1 Stock Compression x 53.8 XL250 79-82 74 248 74.0 STD - - 2913XC - S-376 - XR250 thru 83 x 74.5 0.5 - - 2933XC 10:1 Compression 57.8 75.0 1.0 - 4171M07500 2953XC 75.5 1.5 - - 2973XC 76.0 2.0 - - 2992XC
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