2021 Parts Unlimited Offroad

ENGINE parts-unlimited.com 2021 PARTS UNLIMITED OFFROAD BOLD MAGENTA part numbers are new for 2021 1066 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) 7 For 97‑00 models. 8 For 01‑04 models. 9 For IT250 81‑82, YZ250 80‑81. 10 For YZ250 82. 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 # YAMAHA 2‑STROKE (CONT) YZ125 97‑04 54 125 54.0 STD - 0910-0729 2126CS CW15 - - Racer’s Choice Flat x 134 56.0 2.0 - 0910-0730 2205CS Top Conversion. No 54.5 intake window. Flat Top Conversion Electra Coated YZ125 98‑00 54 124 54.0 STD 0903-0309 726M05400 2126CST CW15 S-467 B1038 Pro‑Lite x 54.5 0.5 0903-0291 726M05450 2146CS *Ceramic Composite ‑ Cylinder sleeving or 54.5 55.0 1.0 0903-0266 726M05500 2165CS replating required for oversizes 56.0 2.0 0903-0215 726M05600 2205CS YZ125 01 54 124 54.0 STD 0903-0288 726M05400 2126CST CW15 S-467 B1001 Pro‑Lite x 54.5 0.5 0903-0268 726M05450 2146CS *Ceramic Composite ‑ Cylinder sleeving or 54.5 55.0 1.0 0903-0228 726M05500 2165CS replating required for oversizes 56.0 2.0 0903-0176 726M05600 2205CS YZ125 02 54 125 54.0 STD 0903-0297 797M05400 2126CST CW15 S-467 B1001 Pro‑Lite x 54.5 0.50 0903-0541 0910-1240 2146CS 54.5 55.0 1.0 - 0910-1241 2165CS 56.0 2.0 0903-0207 797M05600 2205CS YZ125 03‑04 54 125 54.0 STD 0903-0283 797M05400 2126CST CW15 S-467 B1001 Pro‑Lite x 54.5 0.5 0903-0672 0910-1240 2146CS 54.5 55.0 1.0 - 0910-1241 2165CS 56.0 2.0 0903-0250 797M05600 2205CS YZ125 97‑04 54 125 54.0 STD - 765M05400 2126CS CW15 - B1038 7 GP Style – Electra Coated x 134 56.0 2.0 - 765M05600 2205CS - - B1001 8 No intake window; pinned on 54.5 centerline; longer skirt than stock YZ125 05‑20 54 125 54.0 STD 0903-0724 0910-0571 2126CS CW15 0913-0015 B1001 x 134 56.0 2.0 0903-1160 0910-0572 2205CS 54.5 YZ125 05‑20 Racer’s Choice GP Style 54 125 54.0 STD 0903-0513 0910-0799 2126CS CW15 0913-0015 B1001 Electra Coated; CSA Ring is x 134 56.0 2.0 0903-0681 0910-0800 2205CS Titanium Nitride coated; ArmorGlide 54.5 144 58.0 4.0 0903-0682 0910-1255 2284CS skirt coated *Crankcase clearance required for 57mm and larger bore diameter CT‑2 175 thru 77 66 172 66.0 STD - 471M06600 2598CD CW16 S-259 B1021 CT‑3 175 thru 77 x 66.5 0.5 - 471M06650 2618CD DT175 79‑81 50 67.0 1.0 - 471M06700 2638CD MX175 79‑82 67.5 1.5 - - 2658CD YZ175 76‑81 66 172 66.0 STD - - 2598CD CW16 S-259 B1021 IT175 76‑81 x 66.5 0.5 - 374M06650 2618CD 50 67.0 1.0 - 374M06700 2638CD 67.5 1.5 - 374M06750 2658CD 68.0 2.0 - - 2677CD RT180 90‑98 64.5 176 64.5 STD - 0910-2875 2539CD CW16 S-486 - x 0.5 - 0910-2876 2559CD 54 1.0 - 0910-2877 2579CD IT200 84‑86 66 195 66.0 STD - 522M06600 2598CD CW16 S-259 B1005 x 66.5 0.5 - - 2618CD 57 67.0 1.0 - 522M06700 2638CD 67.5 1.5 - - 2658CD 68.0 2.0 - 522M06800 2677CD WR200 92‑98 (Euro only) 66.8 199 66.8 STD - 0910-0801 2628CD CW16 - - x 67.0 0.20 - - 2638CD 57 67.5 0.70 - - 2658CD 68.0 1.20 - - 2677CD YZ250 76‑79 70 246 70.0 STD - 234M07000 2756CD CW18 S-343 B1003 IT250 78‑80 x 70.5 0.5 - 234M07050 2776CD DT250 74‑79 64 71.0 1.0 - 234M07100 2795CD MX250 73‑75 71.5 1.5 - - 2815CD 72.0 2.0 - 234M07200 2835CD YZ250 80‑82 70 246 70.0 STD - 452M07000 2756CD CW18 S-343 B1003 9 IT250 81‑82 x 70.5 0.5 - - 2776CD - - B1014 10 64 70.75 0.75 - - 2786CD 71.0 1.0 - 452M07100 2795CD 71.5 1.5 - 452M07150 2815CD 72.0 2.0 - 452M07200 2835CD