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-   -   Stainless steel valve conversion (http://husaberg.org/mechanical/23566-stainless-steel-valve-conversion.html)

fox February 3rd, 2017 06:23 PM

Stainless steel valve conversion
 
So I just pulled my engine on my 2011 fe570 for the first time while doing some other work to the bike and I'm considering changing out the valves. From what I understand the intake valves are titanium and the exhaust valves are steel. I've heard a number of KTM riders have swapped out titanium valves for steel to improve longevity.
Has anybody here tried converting the intake valves to steel? I had a quick conversation with Kibblewhite and they don't make this conversion but can make it custom (not sure if it'll be worth it though. depends on how much is in common with other parts they already make).

Johnf3 February 5th, 2017 08:47 AM

Why do you think you will get better longevity with a SS valve? Do you have a problem with your stock intake valves now?

The reason I am asking is because the Ti intake valves that Husaberg and KTM use in these bikes are trouble-free and as tough as any other currently available.

fox February 5th, 2017 11:21 AM

That's what I was hoping to hear. I've read about a few ktm riders converting to stainless steel and wasn't sure if it would be worth the hassle to replace my intake valves. It does however look like I at least need to lap my exhaust valves.

screnshaw400 February 5th, 2017 02:41 PM

I second what Johnf3 says. If you had, lets say, a early generation honda crf450 or 250, I would say swap them out. The valves have been the last thing of worry on these engines.

Johnf3 February 6th, 2017 05:19 PM

Quote:

Originally Posted by fox (Post 177644)
That's what I was hoping to hear. I've read about a few ktm riders converting to stainless steel and wasn't sure if it would be worth the hassle to replace my intake valves. It does however look like I at least need to lap my exhaust valves.

On the older KTM RFS bikes with the screw-type adjusters, they had very soft intake valves stock. The fix is the Kibblewhite stainless intake valves.

Over 300 hours on my Husaberg, I have yet to change a shim. 300 hard singletrack hours too. It is a rock solid set up. It is a far superior head design from the RFS (which hurts to say because KTM bought Husaberg in 1997 and ended up copying the head design of the Husaberg to use in the RFS).


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