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Old 12-07-2011, 09:20 PM   #1
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Default Underseat Exhaust vs. Side Exhaust

I was looking at a new sportbike and am into the 600 class. I am noticing that most manufacturers have started to replace the underseat exhaust with a side exit exhaust. I know that sportbikes use to always have a side exhaust so I was wondering if there was a downside to the underseat style?
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Old 12-08-2011, 04:56 AM   #2
The Spaceman
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There are 2 downsides to underseat exhausts:

- They heat up the seating area.

- The mass of the mufflers and pipes is not concentrated at the center of the bike as well as it is with an under-engine setup.

Having said that, my own opinion is that the underseat exhaust style is worth whatever minor gains are had by under-engine configurations. This is especially true when compared to the huge cans you'll see along the sides of bikes like the ZX-14 etc.
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Old 12-08-2011, 06:59 AM   #3
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A carbon fiber (aftermarket) underseat exhaust can help with "heat up the seating area". A CF exhaust does cost more than standard aluminum, though.
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