Stainless steel intake valve and spring conversion kit - YZ250F 2019

Stainless steel conversion kit with everything needed to switch to long-lasting Black Diamond intake valves
Extends the service life of the valve train and intake components up to 4 times longer than OEM titanium parts.
Includes single-piece forged stainless steel inlet valves, heat-treated chrome-silicon valve springs, ultralight titanium retainers, and hardened steel bases
Components are created using Finite Element Analysis (F.E.A.) software, as well as proprietary cam analysis and spring design programmes
Designed and developed specifically for each application
Manufactured in the USA
The intake springs in this kit include a progressive-rate outer spring, which must be installed with the tighter end resting on the H.T. (heat-treated) steel base washers.
The kit includes:
2x inlet valves
2x base washers
2x Valve springs
2x Titanium retainers



Specifications


Brand
KIBBLEWHITE


Supplier reference
80-82350


Valve seat height
1,150"


Valve seat height
1,150"


Valve seat angle
18°


Valve seat angle
18°


Application
Intake


Head diameter
31,00 mm


Head diameter
1,220"


Cylinder head diameter
1,220"


Stem diameter
0,1962"


Stem diameter
5,00 mm


Stem diameter
0,1962"


Spring lift
0,420"


Spring lift
0,420"


Length
3.245"


Length
3,245"


Material
Black Diamond™ stainless steel


Gasket material
Titanium


Product name
Valve(s) and spring(s) kit


Seat spring pressure
55 lb


Open spring pressure
151 lb


Type
Conversion


Units
Kit