Gasgas:

EC 250-F 2010-2015

EC 300-F 2013-2015

Yamaha:

YZ 250 F 2001-2013

KIT FEATURES:

• ALL KITS SOLD WITH VALVE, SPRING, RETAINER, SEAT TO DO COMPLETE REPLACEMENT OF EITHER INTAKE OR EXHAUST SIDE
• ALL COMPONENTS ARE MANUFACTURED UNDER ISO 9001 CERTIFIED FACTORIES
• NITRIDE COATED COMPONENTS TO IMPROVE HEAT TRANSFER & CARBON BUILD-UP FOR INCREASED VALVE TRAIN LIFE

VALVE FEATURES:

• FORGED ONE-PIECE CONSTRUCTION TO HELP WITH WEIGHT REDUCTION & IMPROVED FLOW
• PERFORMANCE VALVES RECEIVE A SWIRL POLISH, SMOOTH STEM TREATMENT, AND ARE MADE OF 21-2N/SUH35HT STAINLESS STEEL

SPRING FEATURES:

• SPRINGS ARE MADE OF SWOSC-V MATERIAL (OIL-TEMPERED STEEL WIRE)
• SOME SPRINGS FEATURE A PROGRESSIVE STYLE DESIGN WITH MORE COILS ON ONE END OF THE SPRING
• PROGRESSIVE SPRINGS ARE HEAVIER ON ONE END AND SHOULD ALWAYS BE INSTALLED TOWARDS THE BOTTOM
• NON-PROGRESSIVE SPRINGS ARE PAINT MARKED AND SHOULD BE INSTALLED TOWARDS THE TOP

SEATS & RETAINERS:

• MADE FROM 4041 STEEL (SELECT APPLICATIONS USE 7075-T6 ALUMINUM)
• DESIGNED TO WORK WITH PSYCHIC STAINLESS STEEL VALVES AND SPRINGS

Crossrefrence Numbers Only: XU-09519EK