2021 Parts Unlimited Offroad

ENGINE parts-unlimited.com 2021 PARTS UNLIMITED OFFROAD BOLD MAGENTA part numbers are new for 2021 1064 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 # SUZUKI 4‑STROKE (CONT) RM‑Z450 13‑20 96 449 96.0 STD 0903-1136 - 0912-0122 CW19 - - 12.5:1 Stock Compression x 62.1 RM‑Z450 13‑20 96 449 96.0 STD 0903-1138 0910-3928 - CW19 - - 13:1 Compression x 62.1 DR650 90‑95 95 641 95 STD - 0910-1658 3740XH CW23 - - LS650 86‑95 x - 0910-1659 - Cylinder boring required for 90.4 oversizes DR650 96‑11 100.0 644 100.0 STD - 0910-5734 - CW23 - - x 82 YAMAHA 2‑STROKE PW50 85‑87/90‑20 40 49 40 STD 0903-0275 653M04000 1574CD - - - x 40.5 0.5 0903-0281 653M04050 1594CD 39.2 41.0 1.0 0903-0269 653M04100 1614CD 41.5 1.5 0903-0197 653M04150 0912-0136 42.0 2.0 0903-0456 0910-2871 YZ65 18‑20 43.5 65 43.5 STD - 0910-5380 - CW12 - - X 43.6 YZ80 74‑75 47 72 47.0 STD - 222M04700 1850CS CW12 S538 B1042 MX80 80‑82 x 47.5 0.5 - - 1869CS TY80 74‑75 42 48.0 1.0 - 222M04800 1890CS GT1 73‑75 48.5 1.5 - - 1909CS PW80 thru 06 47 72 47.0 STD - 649M04700 1850CD CW12 S538 B1042 BW80 thru 00 x 47.5 0.5 - 649M04750 1869CD 42 48.0 1.0 - 649M04800 1890CD 48.5 1.5 - 649M04850 1909CD 49.0 2.0 - 0910-1225 1929CD YZ80 76‑80 49 79 49.0 STD - - 1929CD CW12 S538 B1042 x 50.0 1.0 - 457M05000 1969CD 42 50.5 1.5 - - 1988CD 51.0 2.00 - 457M05100 2008CD YZ80 82‑83 47 79 47 STD - - 1850CD CW12 S538 0924-0125 x 47.5 0.5 - - 1869CD 45.6 48.0 1.0 - 477M04800 1890CD 48.5 1.5 - - 1909CD 49.0 2.0 - 477M04900 1929CD YZ80 84 48 82 48.0 STD - - 1890CS CW12 S538 B1015 x 48.5 0.5 - - 1909CS 45.6 49.0 1.0 - - 1929CS 49.5 1.5 - - 1949CS 50.0 2.0 - 508M05000 1969CS YZ80 85‑87 48 82 48 STD - 520M04800 1890CS CW12 S538 B1015 x 48.5 0.5 - 520M04850 1909CS 45.6 49 1.0 - 520M04900 1929CS 49.5 1.5 - 520M04950 1949CS 50 2.0 - 520M05000 1969CS YZ80 88‑92 48 82 48 STD - 569M04800 1890CS CW12 S538 B1015 x 48.5 0.5 - 569M04850 1909CS 45.6 49 1.0 - 569M04900 1929CS 49.5 1.5 - 569M04950 1949CS 50 2.0 - 569M05000 1969CS YZ80 93‑01 47 82 47.0 STD 0903-0711 646M04700 1850CS CW14 S-517 B1012 Pro‑Lite x 47.5 0.5 - 646M04750 1869CS *Ceramic Composite ‑ Cylinder sleeving or 47.8 48.0 1.0 - - 1890CS replating required for oversizes 49.0 2.0 0903-0715 0910-2868 1929CS YZ80 93‑01 52.5 103.5 52.5 5.5 0903-0213 0910-0366 - CW14 S-288 B1012 Racer’s Choice Supermini x *Ceramic Composite ‑ Cylinder sleeving or 47.8 replating required for oversizes *Crankcase clearance required for 50mm and larger bore diameter