2021 Parts Unlimited Offroad

ENGINE parts-unlimited.com 2021 PARTS UNLIMITED OFFROAD BOLD MAGENTA part numbers are new for 2021 1068 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) 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) YZ490 82‑83 87 487 87.0 STD - 478M08700 3425TD CW18 S-277 B1014 IT490 83‑84 x 87.5 0.5 - 478M08750 3445TD 82 88.0 1.0 - 478M08800 3465TD 88.5 1.5 - - 3484TD 89.0 2.0 - 478M08900 3504TD YZ490 84‑90 87 487 87.0 STD - 546M08700 3425TD CW18 S-277 B1014 WR5091‑93 x 87.5 0.5 - 546M08750 3445TD Pro‑Lite 82 88.0 1.0 - 546M08800 3465TD 88.5 1.5 - 546M08850 3484TD 89.0 2.0 - 546M08900 3504TD YAMAHA 4‑STROKE TTR90E 03‑07 47 90 47.0 STD - 0910-0368 0912-0112 CW13 0913-0005 - 11:1 Hi‑Compression x 92 47.5 0.50 - 0910-0369 0912-0113 Cylinder boring required 51.8 94 48.0 1.00 - - 0912-0114 for oversizes 110 52 .0 5.00 - - 0912-0111 TTR125/L 00‑18 (all) 54 123.7 54.0 STD 0903-0742 4752M05400 - CW15 - - 11:1 Compression x 54.5 0.5 0903-0740 4752M05450 - 54 55.0 1.0 0903-0741 4752M05500 - TTR250 99‑06 73 249 73.0 STD - 4689M07300 2874XC CW18 - - 10.5:1 Compression x 73.5 0.5 - 4689M07350 2894XC 59.6 74.0 1.0 - 4689M07400 2913XC YZ250F/​WR250F 01‑04 77 249 77.0 STD 0903-0554 0910-0573 - CW16 0913-0008 - 12.7:1 Compression (0903‑0554/​0910‑0573) x 262 79.0 2.0 - - 3110XG 13.2:1 Compression (0910‑0574) 53.6 YZ250F 01‑04 77 249 77.0 STD 0903-0561 0910-0806 0912-0140 CW16 0913-0008 - 13.5:1 Compression x Light weight, 2‑ring, gas ported 53.6 ArmorGlide skirt coated YZ250F 01‑11 77 290 83.0 6.0 - 0910-2936 3268XG CW16 0913-0008 - WR250F 01‑13 x 12.5:1 Compression 53.6 290cc Big Bore ArmorGlide skirt coated YZ250F 05‑07 77 250 77.0 STD 0903-0559 0910-0808 - CW16 0913-0008 - WR250F 05‑13 x 263 79.0 2.00 - - 3110XG 12.5:1 Compression 53.6 Nikasil Bore ‑ Cylinder sleeving or replating required for oversizes YZ250F 05‑07 77 250 77.0 STD 0903-0558 0910-0810 0912-0140 CW16 0913-0008 - WR250F 05‑13 x 263 79.0 2.00 - - 3110XG 13.5:1 Compression 53.6 ArmorGlide skirt coated 2 Ring. Race Only. Nikasil Bore ‑ Cylinder sleeving or replating required for oversizes YZ250F 08‑11 77 250 77.0 STD 0903-0937 0910-1678 - CW16 0913-0008 - 13.5:1 Stock Compression x 79.0 2.0 - - 3110XG ArmorGlide skirt coated 53.6 Nikasil Bore YZ250F 08‑11 77 250 77.0 STD 0903-0938 - - CW16 0913-0008 - 14:1 High‑Compression x ArmorGlide skirt coated 53.6 Nikasil Bore YZ250F 12‑13 77 250 77 STD 0903-1146 - - - - - 13.5:1 Stock Compression x Nikasil bore 53.6 YZ250F 14‑15 77 250 77 STD 0903-1143 - 0912-0140 CW16 - - YZ250FX 15‑16 x WR250F 15‑17 53.6 13.5:1 Stock Compression Nikasil bore YZ250F 14‑15 77 250 77 STD - 0910-3917 - CW16 - - YZ250FX 15‑16 x WR250F 15‑17 53.6 14:1 High Compression