2021 Parts Unlimited Offroad

ENGINE parts-unlimited.com 2021 PARTS UNLIMITED OFFROAD BOLD MAGENTA part numbers are new for 2021 1067 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. 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) IT250 83 68 246.8 68.0 STD - 515M06800 2677CD CW18 S-511X B1014 Pro‑Lite x 68.25 0.25 - - 2687CD 68 68.5 0.5 - 515M06850 2697CD 69.0 1.0 - 515M06900 2717CD 69.5 1.5 - - 2736CD 70.0 2.0 - 515M07000 2756CD YZ250 83‑87 68 246.8 68.0 STD - 560M06800 2677CD CW18 S-511X B1014 Pro‑Lite x 68.25 0.25 - - 2687CD *Power Valve must be modified 68 68.5 0.5 - 560M06850 2697CD for .040 and larger 69.0 1.0 - 560M06900 2717CD 69.5 1.5 - 560M06950 2736CD 70.0 2.0 - 560M07000 2756CD YZ250 88‑91 68 246.8 68.0 STD - 605M06800 2677CD CW18 S-508 B1014 WR250 91 x 68.5 0.5 - 605M06850 2697CD Pro‑Lite 68 69.0 1.0 - 605M06900 2717CD *Power Valve must be 69.5 1.5 - 605M06950 2736CD modified for .040 and larger 70.0 2.0 - 605M07000 2756CD *1991 model is Ceramic ‑ Composite Cylinder sleeving or replating required for oversizes YZ250 92‑94 68 246.8 68.0 STD 0903-0716 677M06800 2677CD CW18 S-508 B1014 WR250 92‑94 x 68.5 0.5 0903-0717 677M06850 2697CD Pro‑Lite 68 69.0 1.0 - 677M06900 2717CD *Ceramic Composite ‑ 70.0 2.0 - 0910-1231 2756CD Cylinder sleeving or replating required for oversizes YZ250 92‑98 68 246.8 68.0 STD - 0910-1233 2677CS CW18 S-508 B1014 Racer’s Choice x 250cc Single Ring 68 YZ250 95‑98 68 246.8 68.0 STD 0903-0720 677M06800 2677CD CW18 S-508 B1014 WR250 95‑98 x 68.5 0.5 - 677M06850 2697CD Pro‑Lite 68 69.0 1.0 0903-0722 677M06900 2717CD *Ceramic Composite ‑ 70.0 2.0 0903-0723 0910-1231 2756CD Cylinder sleeving or replating required for oversizes YZ250 99‑01 66.4 249 66.4 STD 0903-0921 804M06640 2614CD CW18 S-508 B1003 Pro‑Lite x 67.0 0.6 - 0910-1244 2638CD *Ceramic Composite ‑ Cylinder sleeving or 72 67.5 1.1 - 0910-1245 2658CD replating required for oversizes 68.5 2.10 - 0910-0207 2697CD YZ250 02‑20, YZ250X 16‑20 66.4 249 66.4 STD 0903-0308 804M06640 2614CD CW18 S-508 B1003 Pro‑Lite x 67.0 0.6 0903-0524 0910-1244 2638CD *Ceramic Composite ‑ Cylinder 72 67.5 1.1 - 0910-1245 2658CD sleeving or replating required 68.5 2.10 0903-0188 0910-0207 2697CD for oversizes YZ250 02‑20, YZ250X 16‑20 66.4 249.3 66.4 STD 0903-0929 0910-0367 0912-0106 CW18 S-508 B1003 250cc Racer’s Choice Single x Ring. Electra Coated 72 ArmorGlide skirt coated DT400 75‑78 85 397 85.0 STD - - 3347TD CW18 S-277 B1003 MX400 75‑78 x 85.5 0.5 - 232M08550 3366TD 70 86.0 1.0 - 232M08600 3386TD 86.5 1.5 - - 3405TD 87.0 2.0 - - 3425TD YZ400 76‑78 85 397 85.0 STD - - 3347TD CW18 S-277 B1003 IT400 76‑78 x 85.5 0.5 - 394M08550 3366TD 70 86.0 1.0 - - 3386TD 86.5 1.5 - 394M08650 3405TD 87.0 2.0 - - 3425TD YZ465 80‑81 85 465 85.0 STD - - 3347TD CW18 S-277 B1014 IT465 81‑82 X 85.5 0.5 - 451M08550 3366TD 82 86.0 1.0 - - 3386TD 86.5 1.5 - 451M08650 3405TD 87.0 2.0 - - 3425TD