2021 Parts Unlimited Offroad

ENGINE parts-unlimited.com 2021 PARTS UNLIMITED OFFROAD BOLD MAGENTA part numbers are new for 2021 1069 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 4‑STROKE (CONT) TT350 85‑98 86 346 86.0 STD - 0910-2916 3386XC CW19 - - XT350 85‑00 x 87 1.0 - 0910-1661 3425XC 9:1 Compression 59.6 1.5 - 0910-2917 - Cylinder boring and replating required for oversizes YZ400F 98‑99 92 399 92.0 STD - 4649M09200 - CW18 - - WR400F 98‑00 x 12.5:1 Compression 60.1 ‑8cc Dome Volume YZ426F 00‑02 95 426 95.0 STD - 4693M09500 - CW19 - - WR426F 01‑02 x 97.0 2.00 - 0910-2918 - 12.5:1 Stock Compression 60.1 YZ426F 00‑02 95 426 95.0 STD - 0910-2919 - CW19 - - WR426F 01‑02 x 97.0 2.00 - 0910-2920 - 13.5:1 High Compression 60.1 YZ450F 03‑05 95 449 95.0 STD 0903-0563 0910-0373 - CW18 - - WR450F 03‑06 x 12.5:1 Standard Compression. Nikasil Bore ‑ Cylinder 63 sleeving or replating required for oversizes YZ450F 06‑09 95 449 95.0 STD 0903-0564 0910-0373 - CW18 - - WR450F 07‑15 x 12.5:1 Standard Compression. Nikasil Bore ‑ Cylinder 63 sleeving or replating required for oversizes. ArmorGlide skirt coated YZ450F 06‑09 95 449 95.0 STD 0903-0566 0910-0375 - CW18 - - WR450F 07‑15 x 13.5:1 Hi‑Compression. Nikasil Bore ‑ cylinder 63.4 sleeving or replating required for oversizes. ArmorGlide skirt coated YZ450F 10‑13 97 449 97 STD - 0910-2884 - CW18 - - 12.5:1 Stock Compression x Nikasil Bore ‑ ArmorGlide skirt coated 60.8 YZ450F 10‑13 97 449 97 STD - 0910-2885 - CW18 - - 13.5:1 High Compression x Nikasil Bore ‑ ArmorGlide skirt coated 60.8 YZ450F 14‑17, YZ450FX 16‑18, WR450F 16‑18 97 449 97 STD 0903-1144 0910-3910 - CW18 - - 12.5:1 Stock Compression x Nikasil Bore, ArmorGlide skirt coated 60.8 YZ450F 14‑17, YZ450FX 16‑18, WR450F 16‑18 97 449 97 ‑ - 0910-3914 - CW18 - - 13.5:1 High Compression x Nikasil Bore, ArmorGlide skirt coated 60.8 SR500 87 499 87.0 STD - 0910-2923 3425XC CW20 - - TT500 77‑81 x 87.5 0.5 - 0910-1666 - XT500 76‑81 84 88.0 1.0 - 0910-2924 3465XC 9:1 Stock Compression Cylinder boring required for oversizes SR500 87 499 87.0 STD - 0910-2899 3425XC CW20 - - TT500 77‑81 x 87.5 0.5 - 0910-1654 - XT500 76‑81 84 88.0 1.0 - 0910-2900 3465XC 10:1 Compression 89.0 2.0 - 0910-2901 3504XC Cylinder boring required for oversizes SR500 87 499 90.0 3.00 - 0910-2927 3544XC CW20 - - TT500 77‑81 x XT500 76‑81 84 3mm Big Bore Stock Compression 9:1 SR500 87 499 90.0 3.00 - 0910-2902 3544XC CW20 - - TT500 77‑81 x XT500 76‑81 84 3mm Big Bore 11:1 Compression XT600 84‑96 95 598 95.0 STD - - 3740XH CW22 - - SRX600 86 x 11.5:1 Compression 84