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Why do more exhaust fumes exit the right side?

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Can anyone tell me why I can see the fumes exiting the right can (horizontal pipe side) of my Remus half system, but not the left (vertical pipe side)? I thought it may have had a little to do with the exhaust leaks I was experiencing after the installation. I've since sealed the leaks. After firing it up today (in cold weather where you can easily see the fumes) to check for leaks, it still was only noticeable coming from the right side for a couple minutes. I checked the joints where I sealed them with some Permatex copper RTV gasket maker, and the leaks were gone. Sorry if this is a dumb question, but I don't remember my stock exhaust doing the same... or maybe I just never noticed it?
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I imagine it's because the right side pipe is for the front cylinder, which has a straighter run than the rear cylinder pipe that has a 90 degree bend and a 180 degree bend in it - I know there is a link between them but predominantly the gas flows in a straight line so the right pipe has less restrictions. I think it balances out at higher RPM though. :)
 

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I was under the impression that the "fumes" you see is primarily water vapor as you heat up the bike. when you turn it off at night cold air can disspate through your exhaust and condense, you get steam for a while when you first warm the engine, but once everything is nice and hot the exhaust is clear and not visible.

Caution: this is a guess...
as far as why one side would show fumes and not the other im not sure about, possibly because the exhaust pipe for the horizontal is lowest on the bike and cools faster allowing more condensation buildup during cool down(also less bends would allow cold air to dissipate through much easier). while the vertical cylinder with the bends is closer to the bulk of the engine mass cools slower due to proximity to the thermal mass, and maybe does not allow as much condesation to form during cooling, thus less steam. HOWEVER, again this last paragraph is a guess on my part, could be full of crap

I know my SS once heated up you cant see the exhaust, though when first started, both sides "fume" and close to being fuly warmed up one side stops fuming before the other, but I never thought to remember which, i'll watch it next time.
 

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Discussion Starter · #6 ·
Thanks for the replies folks. After thinking about it a little more, I kinda figured it had something to do with the condensation within the pipe. It just threw me for a loop that it was only visible on the right and not the left.
 

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Hey just curious when you get off your bike are your clothes really smelling of exhaust fumes? I have a 999 with full Termi and I seem to really smell of exhaust fumes, just wondering if this is common?
 

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citthru said:
Hey just curious when you get off your bike are your clothes really smelling of exhaust fumes? I have a 999 with full Termi and I seem to really smell of exhaust fumes, just wondering if this is common?
Buy a spritzer bottle and put some cinnamon oil in it and spritz the hell out of your exhaust pipes before you ride it. This will take care of any manly scents emitting from your Italian Stallion.


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Dark_Daddy said:
Buy a spritzer bottle and put some cinnamon oil in it and spritz the hell out of your exhaust pipes before you ride it. This will take care of any manly scents emitting from your Italian Stallion.


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Thanks for the useful reply! I was really seeking advice weither it was running a little rich, but you're cool and manly!
 
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