BOLD MAGENTA part numbers are new for 2026 PISTON & PISTON KITS PARTS-UNLIMITED.COM OFFROAD | 2026 PISTON & PISTON KITS 1399 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 2-STROKE CR80R 80-82,TC80 70-78 49.5 79.7 49.5 STD - - - CW12 S5382 - x 50 0.5 - 450M05000 1969CD 41.4 50.5 1.0 - - 1988CD 51 1.5 - - 2008CD CR80R 84 49.5 79.7 49.5 STD - - - CW12 S5382 - x 50 0.5 - - 1969CD 41.4 50.5 1.0 - - 1988CD 51 1.5 - - 2008CD CR80R 85 47 82.9 47 STD - - 1850CD CW13 - - x 47.5 0.5 - - 1869CD 48.5 1.5 - - 1909CD CR80R 86-91 47 82.9 47 STD - 643M04700 1850CS CW14 S-517 B1012 Nikasil Bore - Cylinder sleeving or replating required for oversizes. x 47.8 47.5 0.5 - 643M04750 1869CS Pro-Lite. 48 1.0 - 643M04800 1890CS 49 2.0 - 0910-1221 1929CS CR80R 92-02 47 82.9 47 STD 0903-0298 643M04700 1850CS CW14 S-517 B1012 Nikasil Bore - Cylinder sleeving or replating required for oversizes. x 47.8 47.5 0.5 - 643M04750 1869CS Pro-Lite. 48 1.0 - 643M04800 1890CS 49 2.0 - 0910-1221 1929CS CR80R 86-02 47 82.9 47 STD - - 1850CS CW14 S-517 B1012 GP Style. Electra coated. x 90.1 49 2.0 - - 1929CS 47.8 CR80R (supermini) 93-02, CR85R 03-07 52 101.5 52 5.0 0903-0285 0910-0322 - CW14 - B1012 x 47.8 CR85R 03-07 47.5 84.7 47.5 STD 0903-0302 833M04750 1869CS CW14 S-517 B1012 Nikasil Bore. x 48 0.5 0903-0670 - 1890CS Pro-Lite. 47.8 48.5 1.0 - 0910-1253 1909CS 49.5 2.0 0903-0175 - 1949CS 50.5 3.0 0903-0183 - - CR85R 03-07 47.5 84.7 47.5 STD - 0910-0323 1869CS CW14 S-517 - GP Style. x Electra coated. 47.8 CR125M 73-78, MT125 73-78 56 123 56 STD - 339M05600 2205CD CW14 S-3942 B1018 x 56.5 0.5 - - 2224CD 50 57 1.0 - 339M05700 - 57.5 1.5 - - - 58 2.0 - - - CR125R 79 56 123 56 STD - - - CW14 S-3942 B1018 Chrome Bore - Cylinder sleeving or replating required for oversizes. x 50 56.5 0.5 - 448M05650 2224CD 57 1.0 - - - 57.5 1.5 - 448M05750 - CR125R 80-84 55.5 120 55.5 STD - - 2185CD CW14 S-3942 B1018 x 56 0.5 - - 2205CD 50 56.5 1.0 - 448M05650 2224CD 57 1.5 - - - 57.5 2.0 - 448M05750 - CR125R 85-86 54 124 54 STD - - 2126CD CW14 0913-0006 B1006 Pro-Lite. x 54.25 0.25 - - - 54 54.5 0.5 - 518M05450 - 55 1.0 - - 2165CD 55.5 1.5 - - 2185CD 56 2.0 - 518M05600 2205CD CR125R 87 54 124 54 STD - - 2126CS CW14 S-288 B1018 Pro-Lite. x 55 1.0 - - - *Power Valve must be modified for 0.0040 and longer. 54 56 2.0 - - 2205CS CR125R 88-89 54 125 54 STD - 564M05400 2126CS CW15 S-467 B1001 Pro-Lite. x 54.25 0.25 - - - *1989 model has Nikasil Bore - Cylinder 54.5 54.5 0.5 - - 2146CS sleeving or replating required for oversizes. 55 1.0 - 564M05500 - 55.5 1.5 - - - 56 2.0 - - 2205CS CR125R 90-91 54 125 54 STD - - 2126CS CW15 S-467 B1001 Nikasil Bore - Cylinder sleeving or replating required for oversizes. x 54.5 54.5 55 0.5 1.0 - - - 595M05500 2146CS - Pro-Lite. HIGH-PERFORMANCE PISTONS (CONT) 2 Piston pin not included.
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