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Yamaha YZ250F YZ250FX 14-17 Intake Spring Kit - 0.425" Lift - KPMI 80-80970

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$261.95
Stainless Steel Intake Valve Conversion Kits (Intake Only Kits)

These kits can extend the life expectancy of the intake valves by 3 times over the stock valves.

KPMI`s Intake Only Kits have been designed as a stainless steel valve conversion system to replace factory titanium intake valves and components. KPMI’s engineers use our proprietary design and simulation softwares to create these systems. Our design, simulation, and manufacturing processes insure compatibility of the valve spring’s force and natural frequency with the cam profile, the mass of the system, and the engine RPM. Literally thousands of riders have converted to these kits to extend the life of their intake valves.

Note* Use OEM Valve Stem Seals

Type: Intake
Retainer Material: Titanium
Valve Lift 0.425"
Installed Height 1.180"
Seat Pressure 48#
Open Pressure 151#
@ Lift 0.425"
Note* It may be necessary to use KPMI® shortened valve guides (KPMI® #80-8092X & 80-8093X) to achieve higher than stock lift.