its not good at all as all 2 stroke engines are very exhaust sensitive & need the "stuffing" effect from a proper expansion chamber to be anywhere near efficient 
thats THE worst exhaust system i've ever seen!
have a look at this page for a reasonably easy to follow explanation and some diagrams illustrating the theory -
http://www.southernskies.net/page_in...okeengine.html
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Last edited by showtime; 05-01-2008 at 09:54 PM.
Reason: added link to webpage
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