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Old 03-08-2014, 01:45 PM   #1
dgjackson40 OP
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990 Exhaust Pipe Color

I am new to the KTM 990. Do the exhaust pipes tend to blue in color? With my other bikes when I would get pipes blueing in this manner it usually meant lean fuel issues or sometimes with leaving choke open too long. Does the color of these pipes look normal? Even the cans are taking on a burnish hue.

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Old 03-08-2014, 02:38 PM   #2
Dan Diego
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Blue? It appears you have a Yamaha OEM exhaust on your KTM!

(J/K---mine looks like that, too.)
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Old 03-08-2014, 05:23 PM   #3
dgjackson40 OP
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Normal Then?

Good to know its normal then?

My Yammiehammer don't look like that!!
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Old 03-08-2014, 06:04 PM   #4
Chuckracer
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Normal. That's the built-in "Bas-Ass" that does that. You won't find that on a Yamaha.
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Old 03-08-2014, 11:27 PM   #5
Zuber
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Some of that is due to the SAS that injects air down the pipes and burns fuel down the pipes.

Rich mix puts fuel down the exhaust. Lean puts fuel down the exhaust too.

Looks good.
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Old 03-10-2014, 05:58 PM   #6
dgjackson40 OP
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Sas

Hmmm, I removed the SAS from my VStar 1100. Might just be an option for the 990....

By the way, anyone out there in the market for a 2005 VStar 1100 Midnight Custom....Now that I have the 990 I am thinking I'll not be riding it much....
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Old 03-10-2014, 06:46 PM   #7
rockitman4x4
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My turned blue, I removed the SAS and installed FMF 4.1 pipes on it the first week I got it. No remap but the bike runs great. It only has 700 miles on it, been winter here
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Old 03-11-2014, 02:37 PM   #8
Head2Wind
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Notice the headers in Zuber's ICON pic? That is not an exaggeration of what the headers can look like in the dark.... Some dark night, open the garage door, point the back side of the beast out the door and put it up on the center or side stand, then start it and let it idle for about 5 minutes or so..... turn the lights out, let your eyes adjust and then go take a look at the header pipes on your still running ADV... they will most likely be a dull red near the exhaust port.
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Old 03-11-2014, 09:38 PM   #9
Zuber
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Quote:
Originally Posted by Head2Wind View Post
Notice the headers in Zuber's ICON pic? That is not an exaggeration of what the headers can look like in the dark.... Some dark night, open the garage door, point the back side of the beast out the door and put it up on the center or side stand, then start it and let it idle for about 5 minutes or so..... turn the lights out, let your eyes adjust and then go take a look at the header pipes on your still running ADV... they will most likely be a dull red near the exhaust port.
One of my favorite photos. Probably from about 2000 year dyno run. Here it is in high res if anyone wants it.
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