BOLD MAGENTA part numbers are new for 2025 PARTSCANADA.COM 2025 | OFFROAD ENGINE ENGINE 726 DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 4-6 FOR CATEGORY CODES, IMPORTANT EPA/CARB EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND NOTICE REGARDING NOISE REGULATIONS. PRODUCTS NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES IF NOT CATEGORIZED AS “1” OR “4”. HIGH-PERFORMANCE PISTONS (CONT) FITS MODEL BORE (MM) X STROKE (MM) DISP. (CC) BORE SIZE (MM) OVERSIZES (MM) PK KIT PART # PISTON PART # REPL. RING SET PART # REPL. CIRCLIPS PART # (PR.) REPL. WRIST PIN PART # TOP-END BEARING PART # SUZUKI 4-STROKE RM-Z250 04-05 Standard Compression 77 250 77 STD - 0910-0354 0912-0140 CW16 - - x 53.6 RM-Z250 07-09 13.4:1 Compression 77 250 77 STD - 0910-0852 0912-0140 CW16 - - x 53.6 RM-Z250 10-24 77 250 77 STD - - 0912-0140 CW16 - - x 53.6 DR-Z400 (all) 00-24 12.2:1 Stock Compression 90 398 90 STD - 4713M09000 - - - - x 62.6 RM-Z450 05-07 12:1 Compression Skirt Coated 95.5 450 95.5 STD - 0910-0791 - CW19 0913-0012 - x 62.8 YAMAHA 2-STROKE PW50 85-87, 90-24 40 49 40 STD - - - - - - x 40.5 0.5 - 653M04050 - 39.2 PW80 91-06, BW80 86- 00 47 72 48.5 1.5 - - - - - B1042 x 42 YZ80 93-01 Racer’s Choice Supermini Ceramic Composite - sleeving or replating required for oversizes Crankcase clearance required for 50mm and larger bore diameter 52.5 103.5 52.5 5.5 - 0910-0366 - CW14 - B1012 x 47.8 YZ85 02-24 Pro-Lite Ceramic Composite 47.5 85 47.5 STD - 805M04750 - CW14 - B1012 x 47.8 YZ85 02-24 Racer’s Choice Supermini Ceramic Composite 52.5 103.5 52.5 5.5 - 0910-0366 - CW14 - B1012 x 47.8 YZ125 98-01 Pro-Lite Ceramic Composite 54 124 54 STD - 726M05400 - CW15 - - x 54.5 YZ125 01 Pro-Lite Ceramic Composite 54 124 54 STD - 726M05400 - CW15 - B1001 x 54.5 YZ125 02-04 Pro-Lite 54 125 54 STD - 797M05400 - CW15 - B1001 x 54.5 YZ125 05-21,YZ125X 20-22 Racer’s Choice GP Style Electra Coated Crankcase clearance required for 57mm and larger bore diameter 54 125 54 STD - 0910-0799 - CW15 - B1001 x 144 58 4.0 - 0910-1255 - 54.5 YZ125 22-24,YZ125X 23-24 Pro-Lite 54 125 54 STD - 0910-6456 - - - - x 56 2.0 - 0910-6457 - 54.5 - YZ125 22-24,YZ125X 23-24 Racer’s Choice GP Style 54 125 54 ST - 0910-6458 - - - - x 54.5 YZ250 92-98, WR250 92-98 Ceramic Composite. Pro-Lite 68 246.8 68 STD - 677M06800 - CW18 S-508 B1014 x 68 YZ250 09-24,YZ250X 16-24 Pro-Lite 66.4 249 66.4 STD - 804M06640 - CW18 S-508 B1003 x 72
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