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Old 08-07-2012, 10:25 AM   #13
SnapCracklePop's Avatar
Joined: Jan 2006
Location: Sutter Creek, CA
Oddometer: 7
Originally Posted by alongat View Post

WTF? I guess it really needs some back-pressure from the catalyst and the muffler design itself. I have no idea which map is loaded on the bike but I am prepared to try having my dealer load the Akrapovic map for the bike since it accommodates for less back-pressure. Could it be this simple? The most annoying things in life often are solved with simple solutions, aren't they? In any case, I believe that I am prepared to rule out the fuel pump at this point - check all electrical connections and inquire with my dealer about that optional map. Any other suggestions or words of wisdom?

I wanted to keep mine quiet , but try to get rid of the heat so I drilled out the cat inside the muffler.
It stayed pretty quiet (quieter than my FMF Q4) but started stalling intermittently, and 'hunting' about at low rpms.
I did the 15-min idle thing , didn't help (it has the Akra mapping) .
I put the Q4 back on and it runs perfectly.

It really seems to me that it needs the backpressure to run right.
tho as always , YMMV.
- Rick

'08 KTM 690 Enduro
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