BOLD MAGENTA part numbers are new for 2025 ENGINE PARTS-UNLIMITED.COM OFFROAD | 2025 ENGINE 1251 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 INTAKE VALVE SPRINGS EXHAUST VALVE SPRINGS INTAKE SPRING SEATS EXHAUST SPRING SEATS INTAKE VALVE LOCKS EXHAUST VALVE LOCKS HONDA CRF250R/X 04-17 - - - - - 0926-0522 CRF450R 02-06 0926-0648 0926-0647 0926-05461 0926-0547 0926-0524 0926-0525 CRF450R 07-08 0926-0648 0926-0647 0926-05461 0926-0547 0926-0524 0926-0522 CRF450R 09-16 - - - - - 0926-0522 CRF450X 05-06 0926-0648 0926-0647 0926-05461 0926-0547 0926-0524 0926-0525 CRF450X 07-17 0926-0648 0926-0647 0926-05461 0926-0547 0926-0524 0926-0522 KAWASAKI KX250F 04-15 - - - - - 0926-0520 SUZUKI RM-Z250 04-17 - - - - - 0926-0520 RM-Z450 05-17 - - - - - 0926-0529 1 4-piece. VALVE SPRINGS/RETAINERS/ SEATS/LOCKS SPRINGS •Purpose built racing valve spring made from the highest quality Kobe spring wire • Single spring, low drag design increases horsepower •Designed for use with most cam grinds • Sold as pairs, unless noted •Springs can only be used on titanium valves SPRING SEATS •Precision CNC machined from 8620 case hardened steel •High tolerances ensure seats are flat for the longest possible life •Pad is parallel to bottom surface for consistent spring pressures •Made with various thicknesses •Specially designed for use with CV4’s valve springs only • Sold as pairs, unless noted VALVE LOCKS •CNC machined from 8620 steel • Industry first color-coded, purpose-built intake-sized and exhaust-sized design •Design allows keepers to stay locked at higher rpm • Sold as two pair, unless noted FITS MODEL INTAKE VALVE KIT EXHAUST VALVE KIT SINGLE INTAKE VALVE HONDA CRF250R/X 04-07 - - 0926-2203 CRF250R 08-09, CRF250X 08-17 - - 0926-2203 CRF450R 02-06, CRF450X 05-06 0926-2105 - - CRF450R 07-08, CRF450X 07-17 0926-2105 0926-2108 - FITS MODEL INTAKE VALVE KIT EXHAUST VALVE KIT SINGLE INTAKE VALVE YAMAHA WR250F 01-11 - - 0926-22161 YZ250F 02-13 - - 0926-22161 YZ450F 03-09,WR450F 03-15 0926-2145 - - 1 Outer. X2 STEEL VALVES BY XCELDYNE •X2 steel valves are a direct descendant of the Xceldyne full-race titanium valves •Increased flow over stock valves •Optimized for weight reduction •Specialized high-performance steel alloys specific to the intake and exhaust valve •Oversized kits available •Designed to work with X2 or Xceldyne premium full-race components •Designed specifically for the off-road enthusiast •Available as single units or in various kit forms including the valves, springs, retainers, locators and locks 0926-0640
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