BOLD MAGENTA part numbers are new for 2026 PISTON & PISTON KITS PARTS-UNLIMITED.COM OFFROAD | 2026 PISTON & PISTON KITS 1419 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) YZ85 02-24 52.5 103.5 52.5 5.5 0903-0271 0910-0366 - CW14 S-288 B1012 Racer’s Choice Supermini. x CSA Ring is Titanium Nitride. coated 47.8 ArmorGlide skirt Coated. Ceramic Composite - Cylinder sleeving or replating required for oversizes. Crankcase clearance required for 50mm and larger bore diameter. DT100, LT100/-2/-3/ MX100 72-83 52 98 52 STD - 235M05200 2047CD CW14 S-288 B1012 x 52.5 0.5 - - 2067CD 45.6 53 1.0 - 235M05300 2087CD 54 2.0 - - 2126CD RT100 90-00 52 97 52 STD - 0910-0795 2047CD CW14 S-288 B1012 x 52.5 0.5 - 0910-0796 2067CD 45.6 53 1.0 - 0910-0797 2087CD AT2/AT3 125 72-73, DT125 73 and up, IT125 80-81, MX125 74-76 56 123 56 STD - - 2205CD CW16 S-270 B1016 x 56.5 0.5 - 236M05650 2224CD 50 57 1.0 - 236M05700 - 58 2.0 - - - YZ125 76-82 56 123 56 STD - - 2205CS CW16 S-270 B1016 x 56.25 0.25 - - - 50 56.5 0.5 - - 2224CS 56.75 0.75 - - - 57 1.0 - 435M05700 2244CS 57.5 1.5 - - 2264CS 58 2.0 - 435M05800 2284CS YZ125 86-88 56 123 56 STD - - 2205CS CW16 S-514 B1016 Power Valve must be modified for 0.040 and larger. Pro-Lite. x 56.25 0.25 - - - 50 56.5 0.5 - - 2224CS 56.75 0.75 - - - 57 1.0 - 559M05700 2244CS 57.5 1.5 - 559M05750 2264CS 58 2.0 - - 2284CS YZ125 89 56 123 56 STD - - 2205CS CW16 S-270 B1016 Ceramic Composite - Cylinder sleeving or replating required for oversizes. x 50 56.5 57 0.5 1.0 - - - - 2224CS 2244CS Pro-Lite. YZ125 90-92 56 124 56 STD - 0910-1681 2205CS CW16 S-514 B1016 Ceramic Composite - Cylinder sleeving or replating required for oversizes. x 50.7 57 1.0 - 0910-2867 2244CS Pro-Lite. YZ125 93 56 124 56 STD - 629M05600 2205CS CW16 S-514 B1016 Ceramic Composite - Cylinder sleeving or replating required for oversizes. x 50.7 56.5 57 0.5 1.0 - - - 629M05700 2224CS 2244CS Pro-Lite. YZ125 94-96 54 124 54 STD - 647M05400 2126CS CW16 S-514 B1016 Ceramic Composite - Cylinder sleeving or replating required for oversizes. Pro-Lite. x 54.5 0.5 - 647M05450 2146CS 54.5 55 1.0 - - - 56 2.0 - - 2205CS YZ125 97 54 124 54 STD - - 2126CS CW15 S-467 B1038 Ceramic Composite - Cylinder sleeving or replating required for oversizes. x 54.5 Pro-Lite. YZ125 97-04 54 125 54 STD - 0910-0729 2126CS CW15 - - Racer’s Choice; flat top conversion. x 134 56 2.0 - 0910-0730 2205CS Electra Coated. 54.5 No intake window. YZ125 98-00 54 124 54 STD 0903-0309 726M05400 2126CST CW15 S-467 B1038 Ceramic Composite - Cylinder sleeving or replating required for oversizes. Pro-Lite. x 54.5 0.5 0903-0291 726M05450 2146CS 54.5 55 1.0 - 726M05500 - 56 2.0 0903-0215 726M05600 2205CS YZ125 01 54 124 54 STD 0903-0288 726M05400 2126CST CW15 S-467 B1001 Ceramic Composite - Cylinder sleeving or replating required for oversizes. Pro-Lite. x 54.5 0.5 - 726M05450 2146CS 54.5 55 1.0 0903-0228 726M05500 - 56 2.0 0903-0176 726M05600 2205CS YZ125 02 54 125 54 STD 0903-0297 797M05400 2126CST CW15 S-467 B1001 Pro-Lite. x 54.5 0.5 - 0910-1240 2146CS 54.5 55 1.0 - - - 56 2.0 - 797M05600 2205CS YZ125 03-04 54 125 54 STD 0903-0283 797M05400 2126CST CW15 S-467 B1001 Pro-Lite. x 54.5 0.5 - 0910-1240 2146CS 54.5 55 1.0 - - - 56 2.0 0903-0250 797M05600 2205CS HIGH-PERFORMANCE PISTONS (CONT)
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