BOLD MAGENTA part numbers are new for 2026 ENGINE PARTSCANADA .COM OFFROAD | 2026 ENGINE 749 DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 4-6 FOR CATEGORY CODES, IMPORTANT EPA/CARB EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND NOTICE REGARDING NOISE REGULATIONS. PRODUCTS NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES IF NOT CATEGORIZED AS “1” OR “4”. HIGH-PERFORMANCE PISTONS (CONT) HIGH-PERFORMANCE PISTONS continued on next page. FITS MODEL BORE (MM) X STROKE (MM) DISP. (CC) BORE SIZE (MM) OVERSIZES (MM) PK KIT PART # PISTON PART # REPL. RING SET PART # REPL. CIRCLIPS PART # (PR.) REPL. WRIST PIN PART # TOP-END BEARING PART # HONDA 2-STROKE (CONT) CR250R 78-80 Chrome Bore - Cylinder sleeving or replating required for oversizes. 2756CDM rings required for Standard Chrome Bore. 70 248 70 STD - - 2756CD CW18 - B1003 x 72 2.0 - - 2835CD 64.4 CR250R 81-83 66 246 66.5 0.5 - - - CW18 - B1003 x 72 CR250R 84-85 Pro-Lite. 66 246 66 STD - - - CW18 - B1003 x 72 CR250R 86-96 Nikasil Bore. Pro-Lite. 66.4 249 66.4 STD - 614M06640 2614CD CW18 S-508 B1003 x 72 CR250R 97-01 Nikasil Bore. Pro-Lite. 66.4 249 66.4 STD - 702M06640 - CW18 S-508 B1003 x 72 CR250R 02-04 Pro-Lite. 66.4 249 66.4 STD - 801M06640 2614CD CW18 S-508 B1003 x 72 CR250R 05-07 Single ring. Electra Coated. 66.4 249 66.4 STD - - - CW18 S-508 B1003 x 72 CR480R 82-83 Pro-Lite. ArmorGlide skirt coated. 89 472 89 STD - - - CW20 - B1004 x 76 CR500R 84-01 Pro-Lite. ArmorGlide skirt coated. 89 491 89 STD - - - CW20 - B1004 x 79 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) CRF80F 04-09, XR80R 79-91 9.7:1 Compression. 47.5 79.7 48.5 1.0 - 0910-0325 - - - - x 45 CRF100F 04-13, XR100R 85-03 9.4:1 Compression. 53 99.2 53.5 0.5 - 0910-0328 - CW14 - - x 45 XR/XL185 (+ 0.100 Big Bore) 86-02 10:1 Compression. Cylinder boring required for oversizes. 65.5 192 66 0.5 - 4156M06600 2598XC CW15 - - x 57.8 XR200 to 83 10:1 Compression. 65.5 192 66 0.5 - 4156M06600 2598XC CW15 - - x 57.8 CRF230F 03-19 11:1 Compression. 65.5 223 65.5 STD - 0910-0332 - CW15 - - x 66.2 CRF250R 04-07, CRF250X 04-17 12.9:1 Standard Compression. 78 249 78 STD - 0910-0333 0912-0120 CW16 - - x 52.2 CRF250R 10-13 13.2:1 Stock Compression. ArmorGlide skirt coated. 76.8 249 76.8 STD - 0910-2886 - - - - x 53.8 CRF250R 14-15 14:1 Compression. ArmorGlide skirt coated. Strutted Forging. 76.8 249 76.8 STD 0910-6070 - - CW16 - - x 53.8 CRF250R 16-17 13.5:1 Compression. ArmorGlide skirt coated. Strutted Forging. 76.8 249 76.8 STD 0910-6077 - - CW16 - - x 53.8 XL250 79-82, XR250 thru 83 10:1 Compression. 74 248 74 STD - - - CW19 - - x 57.8 CRF450R 02-08, CRF450X 05-17 12:1 Compression (Standard for CRF450R 04). 96 449 96 STD - 0910-0334 - CW19 - - x 62.1 CRF450R 02-08, CRF450X 05-17 13:1 Hi-Compression. Skirt coated. 96 449 96 STD - 0910-0335 - CW19 - - x 62.1
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