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Old 12-11-2013, 09:48 AM   #1
x1valin1x OP
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HELP Dirty Throttle body- Ktm 990 adv r

Hi all-
My friend has a Ktm adventure 990 R and we are in the process of doing some needed maintenance on it. Valves,sparkplugs, fluids etc. the list goes on . I had a question about something that came up. So we took off the airbox, his rear throttle body is all dirty/ oil residue in there. In my 990 when I did maintenance the bodies were both dry and clean. He also told me that the rear spark plug was very wet. Also occasionally his bike would smoke a little bit and backfire. I was thinking his bodies need to be synched? Anyone else have some input?
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Old 12-11-2013, 10:57 AM   #2
bajamcguide
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could be tight valves not sealing. how many miles since last valve check?
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Old 12-12-2013, 09:38 AM   #3
x1valin1x OP
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Quote:
Originally Posted by bajamcguide View Post
could be tight valves not sealing. how many miles since last valve check?
23,000 haha I'm not so sure he has ever done them.
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Old 12-12-2013, 12:12 PM   #4
Bullskin
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My rear throttle body (on a 2010) has always had an oily residue at least as long as I can remember. Probably saw it at the first valve check. My bike has 36,000 miles and my valves have never required adjusting. I have never really worried about the oil residue. The bike has always performed flawlessly.
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Old 12-12-2013, 01:09 PM   #5
Newbusa
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My 2010R has oil residue on rear throttle body as well and valves in spec.Does not seem to burn oil between changes,I just cleaned it up and re-installed. If it ain't broke don't fix it
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Old 01-14-2014, 09:47 PM   #6
jwalters
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My 2008 990S has dirty throttle bodies as well. I keep the valves in spec but they still acquire some varnish (50,000+ miles on the odometer). I think it's normal for these bikes. Possibly due to crank case venting some oil into the airbox?? Not sure, but that would be my guess. Regardless, I wouldn't worry about, check the valves and go from there.


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My 2010R has oil residue on rear throttle body as well and valves in spec.Does not seem to burn oil between changes,I just cleaned it up and re-installed. If it ain't broke don't fix it
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Old 12-12-2013, 01:35 PM   #7
Themastermike
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2009R rear throttle body soiled, front clean as a whistle. Figured the fog from the oil breather would dump down the front inlet but doesn't appear to be doing so.

I doubt if it its any thing with tight valves. Just checked mine and all were in spec.

Mine does pop some in town. Runs good on the throttle. Will monitor.

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Old 12-12-2013, 03:32 PM   #8
soupbone
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dirty throttle body

2010R rear throttle body was dirty too. just looked at valves at 12k. all in spec. i figured it was the case breather. runs great with Wings no pop or backfire. still that dang snatchy throttle tho.
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Old 12-12-2013, 05:25 PM   #9
Newbusa
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Quote:
Originally Posted by soupbone View Post
2010R rear throttle body was dirty too. just looked at valves at 12k. all in spec. i figured it was the case breather. runs great with Wings no pop or backfire. still that dang snatchy throttle tho.
I have the Akro pipes and a remap and mine does not have a snatchy throttle.
Remap was done on the Dyno by ECunleashed.
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Old 12-15-2013, 08:17 PM   #10
x1valin1x OP
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Measurements taken today

Hi all just an update. Measurements were taken today of gaps and shims and everything was pretty close to being in spec. . Will keep everyone in the loop if we find out anything.
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Old 01-13-2014, 12:19 AM   #11
two trackin fool
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12,500 miles ~ Rear Throttle body dirty . Occasional Pop or miss in left pipe at idle . I haven't made it to the valve covers yet .
My throttle seems to have mellowed OR I am just use to it
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