2021 Parts Unlimited Offroad

ENGINE parts-unlimited.com 2021 PARTS UNLIMITED OFFROAD BOLD MAGENTA part numbers are new for 2021 1047 DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES. SEE PAGE 4 FOR IMPORTANT EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND WARRANTY INFORMATION. HIGH-PERFORMANCE PISTONS (CONT) HIGH PERFORMANCE PISTONS continued on next page. 1 Not for use with piston PART #s 0910‑2022, 0910‑2023, 0910‑2024, 0910‑2025 or 0910‑2026. 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 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 - - 3504TD 1 CW20 S-512X B1004 Pro‑Lite x 90.0 1.0 - - 3544TD 1 76 90.5 1.5 - - 3564TD 1 91.0 2.0 - - 3583TD 1 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 - - 3504TD 1 CW20 S-512X B1004 Pro‑Lite x 90 1.0 - - 3544TD 1 79 90.5 1.5 - - 3564TD 1 91 2.0 - - 3583TD 1 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 Race Only 39 88 52.0 13.0 - - 0912-0111 CW13 - - XR50R 88‑03 x CRF50F 04‑13 41.4 13:1 Compression *Will not fit OEM cylinder XR50R 00‑03 39 49.5 39.0 STD - 0910-0202 - CW13 0913-0005 - CRF50F 04‑13 x 50.7 39.5 0.50 - 0910-0203 - 11:1 Compression 41.40 52 40.0 1.00 - 0910-0204 - XR70R 97‑03 47 72 47.0 STD 0903-0933 0910-0747 0912-0112 CW13 0913-0005 - CRF70F 04‑12 x 73 47.5 0.50 - 0910-0748 0912-0113 10.5:1 Compression 41.4 75 48.0 1.0 - 0910-0749 0912-0114 Cylinder boring required for oversizes 76 48.5 1.5 - - 0912-0115 XR80R 79‑91 47.5 79.7 48.0 0.50 0903-0229 0910-0324 0912-0114 CW13 0913-0005 - 9.7:1 Compression x 48.5 1.00 0903-0230 0910-0325 0912-0115 45 49.0 1.50 0903-0579 - - 49.5 2.0 - 0910-0327 - 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 0912-0117 CW14 - - CRF100F 04‑13 x 12:1 Compression 45 58mm Big Bore. Cylinder sleeving required for oversizes