BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | OFFROAD PISTON & PISTON KITS PISTON & PISTON KITS 1418 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 (CONTO RM-Z450 08-12, RMX450Z 10-19 96 449 96 STD - 0910-1679 - - 0913-0012 - Stock Compression x ArmorGlide skirt coated. 62.1 RM-Z450 13-24 96 449 96 STD 0903-1136 - 0912-0122 - - - 12.5:1 Stock Compression x 62.1 RM-Z450 13-24 96 449 96 STD 0903-1138 0910-3928 - - - - 13:1 Compression x 62.1 DR650 90-95, LS650 86-95 95 641 95 STD - - 3740XH CW23 - - Cylinder boring required for oversizes. x - 0910-1659 - 90.4 DR650 96-11 100 644 100 STD - 0910-5734 - CW23 - - x 82 YAMAHA 2-STROKE PW50 85-87, 90-24 40 49 40 STD 0903-0275 653M04000 - - - - x 40.5 0.5 0903-0281 653M04050 - 39.2 41 1.0 0903-0269 - 1614CD 41.5 1.5 - 653M04150 - 42 2.0 - 0910-2871 YZ65 18-24 43.5 65 43.5 STD - 0910-5380 - CW12 - - x 43.6 BW80 thru 00, PW80 thru 06 47 72 47 STD - 649M04700 1850CD CW12 S538 B1042 x 47.5 0.5 - 649M04750 1869CD 42 48 1.0 - 649M04800 - 48.5 1.5 - 649M04850 1909CD 49 2.0 - - - GT1 73-75, MX80 80-82, TY80 74-75,YZ80 74-75 47 72 47 STD - 222M04700 1850CS CW12 S538 B1042 x 47.5 0.5 - - 1869CS 42 48 1.0 - 222M04800 1890CS 48.5 1.5 - - 1909CS YZ80 76-80 49 79 49 STD - - - CW12 S538 B1042 x 50 1.0 - 457M05000 1969CD 42 50.5 1.5 - - 1988CD 51 2.0 - 457M05100 2008CD YZ80 82-83 47 79 47 STD - - 1850CD CW12 S538 0924-0125 x 47.5 0.5 - - 1869CD 45.6 48 1.0 - 477M04800 - 48.5 1.5 - - 1909CD 49 2.0 - - - YZ80 84 48 82 48 STD - - 1890CS CW12 S538 - x 48.5 0.5 - - 1909CS 45.6 49 1.0 - - 1929CS 49.5 1.5 - - 1949CS 50 2.0 - - - YZ80 85-87 48 82 48 STD - 520M04800 1890CS CW12 S538 - x 48.5 0.5 - 520M04850 1909CS 45.6 49 1.0 - 520M04900 1929CS 49.5 1.5 - 520M04950 1949CS 50 2.0 - 520M05000 - YZ80 88-92 48 82 48 STD - - 1890CS CW12 S538 - x 48.5 0.5 - - 1909CS 45.6 49 1.0 - 569M04900 1929CS 49.5 1.5 - 569M04950 1949CS 50 2.0 - 569M05000 - YZ80 93-01 47 82 47 STD 0903-0711 646M04700 1850CS CW14 S-517 B1012 Ceramic Composite - Cylinder sleeving or replating required for oversizes. Pro-Lite. x 47.5 0.5 - - 1869CS 47.8 48 1.0 - - 1890CS 49 2.0 - - 1929CS YZ80 93-01 52.5 103.5 52.5 5.5 - 0910-0366 - CW14 S-288 B1012 Racer’s Choice Supermini. x Ceramic Composite - Cylinder sleeving or replating required for oversizes. 47.8 Crankcase clearance required for 50 mm and larger bore diameter. YZ85 02-24 47.5 85 47.5 STD 0903-0299 805M04750 1869CS CW14 S-517 B1012 Ceramic Composite - Cylinder sleeving or replating required for oversizes. Pro-Lite. x 48 0.5 - 0910-1246 1890CS 47.8 48.5 1.0 - - 1909CS 49.5 2.0 - - 1949CS HIGH-PERFORMANCE PISTONS (CONT)
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