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February 3rd, 2017, 07:23 PM   #1
fox
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I Ride: 2011 fe570
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).
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February 5th, 2017, 09:47 AM   #2
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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.
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February 5th, 2017, 12:21 PM   #3
fox
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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.
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February 5th, 2017, 03:41 PM   #4
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I Ride: 2012 ktm 300 xc-w.. Peace out 2011 FE 450, kinda happy seeing you go...
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.
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February 6th, 2017, 06:19 PM   #5
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Originally Posted by fox View Post
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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