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Author Topic: Exhaust Carbon Build Up  (Read 2563 times)

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Dood2

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Exhaust Carbon Build Up
« on: February 27, 2011, 07:53:22 PM »
I'm running a 2011 SESG with Vance & Hines  Power Duals and Hi-output mufflers. I had the SE race-tuner done at the dealership.  After about 50 miles the left muffler ( rear cylinder) has a lot of black soot built up around the end of the muffler. The right muffler is clean and clear. The build up was there before I had the dyno tune done and I forgot to mention it to the tech. I haven't had it back to the dealer yet, I was curious if anyone has any ideas.
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rkpultrase

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Re: Exhaust Carbon Build Up
« Reply #1 on: February 28, 2011, 10:22:19 AM »
All the exhaust that is leaving the rear cylender is not necessarly exiting the left exhaust muffler. The front and rear exhaust merges at the xpipe and about 40% goes to the left and 60% goes out the right. 
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Spiderman

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Re: Exhaust Carbon Build Up
« Reply #2 on: February 28, 2011, 11:43:10 AM »
Lots of unmentioned things in this post, but let's take a stab at it anyway.

You say that left side (rear cylinder) muffler had a lot of carbon build up on it BEFORE you had it dyno tuned. From what's been posted on this website regarding the 110 engine in stock configuration (heat buildup etc) and the fact that it has a cut-out that essentially shuts down the rear cylinder under some circumstances, Lots has been said on this subject, but from what I've gleaned, the 110 engine in toto runs exceptionally lean. Given that the rear cylinder has a heat issue, (and I'm guessing) is it possible that the stock OEM EFI set-up has the rear cylinder running a littler richer ? If so, with a multitude of issues on the 110 not burning fuel efficiently (see some of Hoists old posts on his "oil burner" tune-ups in Maine) what you did was allow the natural build up of soot and unburnt fuel that would have gotten clogged in the guts of the stock muffs to find it's way out (not a  bad thing) When you had the SERT installed and the bike Dyno tuned your tech would have dialed it in so that it burns what fuel the Throttle Body,cams, valves etc deliver to the cylinders and your issue with soot (carbon) build-up ended. It would seem now all you need to do is buy a can of oven cleaner and remove the baked on crud around your muff tip and you're good to go

B B
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Dood2

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Re: Exhaust Carbon Build Up
« Reply #3 on: February 28, 2011, 12:59:27 PM »
Spiderman,

Thanks for your post. The issue is that the Carbon/soot  build up continued after the SERT and the Dyno. Pretty much the same as before the tune.
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