KIBBLEWHITE valve spring kit for YAMAHA WR 400 F, WR 426 F, YZ 400 F, YZ 426 F from 1998 to 2002

KIBBLEWHITE offers this valve spring kit for YAMAHA WR 400 F, WR 426 F, YZ 400 F, YZ 426 F from 1998 to 2002. The camshaft opens the valves and the springs close them. At high revs the spring must bring the valve back very quickly: if it is tired, the valve can no longer keep up and “floats”.

Why replace the valve springs?

The benefits:

• Safe running at high revs again.
• Essential with a hotter camshaft or steel valves, which are heavier than titanium.
• Quality steel springs keep their strength longer.

Why choose KIBBLEWHITE?

Kibblewhite chrome-silicon steel springs prevent valve float at high revs.

When should you replace the valve springs on your YAMAHA WR 400 F?

Hard hot starting, valve clearance that keeps closing up or a noisy timing chain: the valve train is wearing.

Specifications and fitting tips

• Contents: 3 x Intake CrSi Valve Springs, 2 x Exhaust CrSi Valve Springs, 3 x Intake Titanium Retainers, 2 x Exhaust Titanium Retainers, 3 x Intake H.T. Steel Basewashers, 2 x Exhaust H.T. Steel Basewashers, 3 x Intake Viton Seals, 2 x Exhaust Viton Seals
• Application: Exhaust, Intake
• Retainer material: Titanium
• Material: Chrome silicon
• Spring pressure: 85 lb
• Seat pressure: 39 lb
• Complete spring kit for one engine

Cross-Mania tip: Check the guides and seats before reassembly and lap the valves in. Titanium valves must not be fitted on worn seats.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
YAMAHA WR 400 F 2001
YAMAHA WR 400 F 2000
YAMAHA WR 400 F 1999
YAMAHA WR 400 F 1998
YAMAHA WR 426 F 2002
YAMAHA WR 426 F 2001
YAMAHA YZ 400 F 1999
YAMAHA YZ 400 F 1998
YAMAHA YZ 426 F 2002
YAMAHA YZ 426 F 2001
YAMAHA YZ 426 F 2000