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What valves do you guys use?

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Hey guys, what make valves do you guys use and what material? I've been told by a mate to use steel exhaust and titanium intakes!! Anyone else heard of this? And has anyone got any opinions or favourites out of the following brands?

Kibblewhite

Faction

Wiseco

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Kaw has some of the best stock valves out there. Use stock!

What year is your bike?

I've got a 09 at the min, how many hours do you get out of the standard vales?

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I've got a 09 at the min, how many hours do you get out of the standard vales?

It depends a lot on air filter maintenance and conditions. But they last from 0-150 hours. Roughly.

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It depends a lot on air filter maintenance and conditions. But they last from 0-150 hours. Roughly.

Cool, any idea how many hours the guides and springs last? Or how often they need to be replaced?

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Cool, any idea how many hours the guides and springs last? Or how often they need to be replaced?

You change the springs when you get new valves.

The guide can probably go much longer. Look for wear on the valve stem, as well as measuring the guide´s ID if you have the tools for it.

New guides every other valve change is probably reasonable.

Clean engine oil, as well as a clean air filter is key.

Valve Guide Inside Diameter:

Exhaust 4.500 ∼ 4.512 mm 4.57 mm (0.1779 in.)

(0.1772 ∼ 0.1776 in.)

Inlet 4.500 ∼ 4.512 mm 4.57 mm (0.1779 in.)

(0.1772 ∼ 0.1776 in.)

Valve/valve Guide Clearance

(wobble method):

Exhaust 0.08 ∼ 0.16 mm 0.32 mm (0.0126 in.)

(0.0031 ∼ 0.0063 in.)

Inlet 0.03 ∼ 0.10 mm 0.26 mm (0.0102 in.)

(0.0012 ∼ 0.0039 in.)

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OEM here. I change them in the off season while I have the bike torn down. Usually at the 40 hour mark. I have never had one go bad though. My old race bike (07 kx250f) that I kept but dont race anymore has about 100 hours on the valves and they have not moved yet.

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