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Old 03-25-2012, 04:58 PM   #1
Tor OP
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F800GS acting up during warmup

This is not a problem in the winter time, when ambient temps are low.

When temps are > 80 F (roughly) the bike starts up fine from cold. After about a minute, it starts to run very rough. It sounds like it runs too rich. As soon as it passes this temperature stage, and warms up further towards normal operating temp, it runs fine again. Anyone else experienced / have this issue? Anyone know what it might be?
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Tor screwed with this post 03-25-2012 at 06:03 PM
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Old 04-01-2012, 07:58 PM   #2
JRWooden
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Tor:

Has it always done this, or just recently start acting up?
Are you under warranty? If so, I'd spin by the shop see if they have a firmware update or any ideas, check for any stored error codes and get them to reset the 'adaptation values" of your bike if they think it might be appropriate.
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Old 04-02-2012, 03:41 AM   #3
Tor OP
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I had the same issue last summer, when the weather temps came up. It's still under warranty. I might call Charlotte and see what they say.
The rough idle only happens during warmup, and then just for about 30 seconds or so. When the bike continues to warm up, it runs fine again. So it appears its only in a very narrow engine temperature range during warmup that this happens.
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Old 04-02-2012, 05:34 AM   #4
JRWooden
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Originally Posted by Tor View Post
I had the same issue last summer, when the weather temps came up. It's still under warranty. I might call Charlotte and see what they say.
The rough idle only happens during warmup, and then just for about 30 seconds or so. When the bike continues to warm up, it runs fine again. So it appears its only in a very narrow engine temperature range during warmup that this happens.
I think I would spin by the shop at worst it will be noted that the problem was occuring under warranty,
at best maybe there is a stored transient error code that means something.
If you set it up in advance it would seem like something they could do while you wait!
Computers ... BAH ... sometimes I long for the good old days.

For a while my bike had a flat spot at about 4k rpm... but it magically worked its self out over a period of about 3 or 4 months...........
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Old 04-02-2012, 07:09 PM   #5
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Yep. Have the same setup. But it ran rough before I put the modification on. I agree it really helps the throttle snatch on the 800. I'll probably end up letting the dealer look at it.

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Old 04-04-2012, 05:07 AM   #6
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Its da gas.... Fresh High octane may clear your problems...

http://advrider.com/forums/showthread.php?t=776074
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Old 04-04-2012, 05:53 AM   #7
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Its da gas.... Fresh High octane may clear your problems...

http://advrider.com/forums/showthread.php?t=776074
Hmmm. I'm running 89 (always have). I'll pour some 93 in her next time I fill up. Not sure why this would affect the warm-up idle, but hey.....I'll try :-). I'm pretty religious about using Techron on a regular interval too. I'll report back.
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Old 04-04-2012, 07:15 PM   #8
Grits&Gravy
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I've used nothing but premium in my F8 from day 1 and still had the same issues Tor has had. I also have a Jeep with a programmer on it and run it in the performance mode, which requires premium gas. I always run premium in it and from time to time the valves will clatter depending on where I fill up. There is apparently a difference between gas brands etc.....
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Old 04-05-2012, 04:10 PM   #9
Tor OP
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Originally Posted by grneggz View Post
I've used nothing but premium in my F8 from day 1 and still had the same issues Tor has had. I also have a Jeep with a programmer on it and run it in the performance mode, which requires premium gas. I always run premium in it and from time to time the valves will clatter depending on where I fill up. There is apparently a difference between gas brands etc.....
You say you had the same issue. Did it just go away, or did you change anything?
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Old 04-05-2012, 04:50 PM   #10
ZachZ
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Me Too

I recently started having the same issue (2011 F800gs). The weather has been in the 60-70's when it happens. I thought it was peculiar however it goes away after the bike warms up. I have a HTCA power commander and I thought that may be causing it b/c I haven't changed the temp switch from cold to hot. It's annoying, but it hasn't inconvenienced me yet.
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