BOLD MAGENTA part numbers are new for 2023 PISTON & PISTON KITS PARTS-UNLIMITED.COM OFFROAD | 2023 1143 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 2-STROKE (CONT) CR250R 81-83 66 246 66.0 STD - 466M06600 2598CD CW18 S-2572 B1003 x 66.5 0.5 - - 2618CD 72 67.0 1.0 - 466M06700 2638CD 67.5 1.5 - - 2658CD CR250R 84-85 66 246 66.0 STD - 526M06600 2598CD CW18 S-511X B1003 Pro-Lite x 66.25 0.25 - 526M06625 2608CD 72 66.5 0.5 - 526M06650 2618CD 66.75 0.75 - 526M06675 2628CD 67.0 1.0 - 526M06700 2638CD 67.25 1.25 - 526M06725 2648CD 67.5 1.5 - 526M06750 2658CD 68.0 2.0 - 526M06800 2677CD CR250R 86-89 66.4 249 66.4 STD 0903-0273 614M06640 2614CD CW18 S-508 B1003 Pro-Lite x 67.0 0.6 0903-0200 614M06700 2638CD *Nikasil Bore - Cylinder sleeving or 72 67.5 1.1 - 614M06750 2658CD replating required for oversizes 68.0 1.6 - 614M06800 2677CD 68.5 2.1 - 614M06850 2697CD CR250R 90-91 66.4 249 66.4 STD 0903-0274 614M06640 2614CD CW18 S-508 B1003 Pro-Lite x 67.0 0.6 - 614M06700 2638CD *Nikasil Bore - Cylinder sleeving or 72 67.5 1.1 - 614M06750 2658CD replating required for oversizes 68.0 1.6 - 614M06800 2677CD 68.50 2.1 - 614M06850 2697CD CR250R 92-96 66.4 249 66.4 STD 0903-0292 614M06640 2614CD CW18 S-508 B1003 Pro-Lite x 67.00 0.6 0903-0272 614M06700 2638CD *Nikasil Bore - Cylinder sleeving or 72 67.5 1.1 - 614M06750 2658CD replating required for oversizes 68.00 1.6 - 614M06800 2677CD 68.50 2.1 0903-0258 614M06850 2697CD CR250R 97-01 66.4 249 66.4 STD 0903-0311 702M06640 2614CD CW18 S-508 B1003 Pro-Lite x 67.0 0.6 0903-0219 702M06700 2638CD *Nikasil Bore - 72 67.5 1.1 0903-0208 702M06750 2658CD Cylinder sleeving or replating 68.0 1.6 0903-0202 702M06800 2677CD required for oversizes 68.5 2.1 0903-0523 0910-1232 2697CD CR250R 02-04 66.4 249 66.4 STD 0903-0307 801M06640 2614CD CW18 S-508 B1003 Pro-Lite x 67.50 1.1 0903-0542 0910-1243 2658CD 72 68.50 2.1 0903-0249 0910-0201 2697CD CR250R 02-04 66.4 249 66.4 STD - 0910-0736 0912-0106 CW18 S-508 B1003 Racer’s Choice 250cc Single Ring x Electra Coated 72 CR250R 05-07 66.4 249 66.4 STD 0903-0550 0910-0737 0912-0106 CW18 S-508 B1003 Single ring x Electra Coated 72 CR480R 82-83 89 472 89.0 STD - 0910-2022 - CW20 S-512X B1004 Pro-Lite x 89.5 0.5 - 0910-2023 - 76 90.0 1.0 - 0910-2024 - 90.5 1.5 - 0910-2025 - 91.0 2.0 - 0910-2026 - CR480R 82-83 89 472 89.0 STD - - 3504TD1 CW20 S-512X B1004 Pro-Lite x 90.0 1.0 - - 3544TD1 76 90.5 1.5 - - 3564TD1 91.0 2.0 - - 3583TD1 CR500R 84-01 89 491 89.0 STD - 0910-2022 - CW20 S-512X B1004 Pro-Lite x 89.5 0.5 - 0910-2023 - ArmorGlide skirt coating 79 90.0 1.0 - 0910-2024 - 90.5 1.5 - 0910-2025 - 91 2.0 - 0910-2026 - CR500R 84-01 89 491 89 STD - - 3504TD1 CW20 S-512X B1004 Pro-Lite x 90 1.0 - - 3544TD1 79 90.5 1.5 - - 3564TD1 91 2.0 - - 3583TD1 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) Z50R 82-87 39 49.5 39.0 STD. - 0910-0738 0912-0107 CW13 - - 11:1 Compression x 50.7 39.50 0.5 - 0910-0739 - Cylinder boring required for oversizes 41.4 XR50R 88-03 39 88 52.00 13.0 - - 0912-0111 CW13 - - CRF50F 04-13 x 10.5:1 Compression 41.4 *Will not fit OEM cylinder 1 Not for use with piston PART #s 0910-2022, 0910-2023, 0910-2024, 0910-2025 or 0910-2026. 2 Piston pin not included.
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