BOLD MAGENTA part numbers are new for 2025 ENGINE PARTSCANADA .COM OFFROAD | 2025 ENGINE 733 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”. FITS MODEL DESCRIPTION COMPRESSION RATIO BORE (MM) PART # SUZUKI RM-Z250 04-06 Standard Bore cylinder (only) - 77 0931-0130 +3 mm Big Bore, 270cc 12.6:1 80 0931-0120 Big Bore gasket kit - - 0934-1525 RM-Z250 07-09 Standard Bore kit 13.4:1 77 0931-0352 RM-Z250 10-18 Standard Bore cylinder (only) - 77 0931-0402 DR-Z400 00-22 Standard Bore kit 11.3:1 90 0931-0283 +4 mm Big Bore, 434cc kit 11.3:1 94 0931-0135 Big Bore gasket kit - - 0934-1527 YAMAHA WR250F 01-13 Standard Bore cylinder (only) - 77 0931-0131 Standard Bore high-compression kit 13.5:1 77 0931-0296 +3 mm Big Bore, 269cc kit 12.5:1 80 0931-0121 Big Bore gasket kit - - 0934-1523 WR250F 15-17 Standard Bore kit 13.5:1 77 0931-0588 WR250F 20-23 Standard Bore cylinder kit 13.8:1 77 0931-1118 Standard Bore cylinder (only) - 77 0931-1117 +3 mm Big Bore, 270cc kit 13.8:1 80 0931-1021 YZ250 99-24 Standard Bore cylinder (only) - 66.4 0931-1078 Standard Bore Kit - 66.4 0931-1095 +5.6 mm Big Bore, 295cc kit - 72 0931-0660 YZ250F 01-07 Standard Bore cylinder (only) - 77 0931-0131 Standard Bore high-compression kit 13.5:1 77 0931-0296 +3 mm Big Bore, 269cc kit 12.5:1 80 0931-0121 Big Bore gasket kit - - 0934-1523 YZ250F 08-13 Standard Bore cylinder (only) - - 0931-0131 +3 mm Big Bore, 269cc kit - - 0931-0121 Big Bore gasket kit - - 0934-1523 YZ250F 14-18,YZ250FX 15-19 Standard Bore cylinder kit 13.5:1 77 0931-0588 YZ250F 19-23,YZ250FX 20-23 Standard Bore cylinder kit 13.8:1 77 0931-1118 Standard Bore cylinder (only) - 77 0931-1117 +3 mm Big Bore, 270cc kit 13.8:1 80 0931-1021 WR450F 07-15,YZ450F 06-09 Standard Bore cylinder (only) - 95 0931-0164 Standard Bore kit 12.5:1 95 0931-0282 WR450F 21-23,YZ450F 20-22 Standard Bore cylinder (only) - 97 0931-1020 YZ450F 03-05 Standard Bore cylinder (only) - 95 0931-0132 YZ450F 10-13 Standard Bore cylinder (only) - 97 0931-0396 YZ450F 14-17,YZ450FX 16-18 Standard Bore cylinder (only) - 97 0931-0396 Standard Bore kit 12.5:1 97 0931-0585 YZ450FX 21-22 Standard Bore cylinder (only) - 97 0931-1020 CYLINDERS AND CYLINDER KITS (CONT) FITS MODEL PART # KAWASAKI KX250F 04-05 0930-0132 SUZUKI RM-Z250 04-06 0930-0132 CYLINDER HEAD KIT •New replacement cylinder head •Includes cam caps and cam cap bolts •Includes C630 (nickel/aluminum/bronze) valve seats and guides •Competition valve job •Shortened valve guides to accept higher lift cams •Unshrouded combustion chamber •Blended bowl seat to port •Stock-shaped ports • Does not include valves, springs or lifters •Made in the U.S.A. DESCRIPTION PART # Standard Bore power valve kit 0935-0952 72 mm Big Bore power valve kit 0935-0953 POWER VALVE KITS FOR YAMAHA YZ250 99-24 •Maintains peak performance • CNC-machined •Hard anodized finish •Available for standard bore and big bore cylinders •Made in the U.S.A. 0935-0953
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