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Old 04-27-2015, 08:52 AM   #1
Notsoold OP
Joined: Apr 2015
Location: Western WA
Oddometer: 2
Top End Bog, Turn key off and on resets

New guy here. Searched but do not see anything specific to my dilemma. Bought a used 2008 990 with low miles and have installed FMF mufflers, Rottweiler intake along with lithium Ion P battery. Has been mapped and runs like a mutha! Well, for a bit anyway. Running on the road it will be fine for say 10 minutes. After this if you roll it on hard from about 6,000 to redline it increasingly gets what feels like a rich bog. If I abuse this symptom it forces the bog down into the 4,500 and up range. Turn the ignition off and back on (while riding still) and it resets and runs hard as hell all the way up to redline... for about 10 minutes. Key off and on and fine again?

Also, does anyone else have a distinct carb whistle right off of idle?

Anxious to get out and start to Adventure but can't till this is resolved...
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Old 04-27-2015, 09:06 AM   #2
Jerkus Maximus
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Joined: Aug 2007
Location: Lowville, NY
Oddometer: 8,471
Fuel filters?
For Sale: 2012 KTM 990 Adventure
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Old 04-27-2015, 11:06 AM   #3
speedy 1
Joined: Jan 2013
Location: 100km north of the Golden Gate
Oddometer: 29
erratic behavior

My stead had some erratic behavior running at speed where cycling the kill switch would reset the problem and then run fine for a few miles
In my case the throttle position sensor voltage in the closed position was too high (.67V) which messed up the whole range
The sensor was adjusted down to .59V and everything is honey again.
Adjusting required removing the right tank and drilling a small hole in the air box for access to the adjustment bolt
browse here for the how to
A volt meter is all that was needed
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Old 04-27-2015, 11:33 AM   #4
Life is a trip
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Joined: Nov 2005
Location: East Med, Greece
Oddometer: 4,100

TPS adjustment is very sensitive. You need to insist on this.
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Old 04-27-2015, 11:58 AM   #5
Hall Monitor
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Joined: Dec 2008
Location: New York City
Oddometer: 13,311
Originally Posted by Chuckracer View Post
Fuel filters?
I was guessing pressure (vacuum) build up in gas tank, but don't know if this would starve an FI motor.
"Hard Work Often Pays Off After Time, but Laziness Always Pays Off Now."

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Old 04-27-2015, 04:20 PM   #6
Gnarly Adventurer
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Joined: Aug 2007
Location: West Baton Rouge
Oddometer: 444
Sounds like fuel filters to me too. I think you may be mistaking a lean condition for a bog. Especially since it gets worse with the more fuel you demand.
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Old 05-04-2015, 12:18 PM   #7
Notsoold OP
Joined: Apr 2015
Location: Western WA
Oddometer: 2
UPDATE: Thanks for the input. So it didn't make much sense to me why clogged filters would be able to provide fuel instantly as soon as the bike came back to life after the key off and right back on. But seeing I had chassed everything else and not having anything else to try I just replaced the whole damn pump (proud of those) and guess what... fixed. Issue completely gone and bike runs great.
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Old 05-04-2015, 06:13 PM   #8
Joined: Jan 2014
Location: Lyman, ME
Oddometer: 63
this sounds very similar to an issue i am seeing with my bike....

its only 1 year old with 11k miles though...does this sound like a pump or filter issue
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