top exhaust doesnt heat up?!

The upper muffler might be used as a resonance chamber or something of that sort, with the main flow going out through the lower muffler and only a bypass flow going out the upper one, if that connection is an actual pipe between the two mufflers. Interesting and odd design, but there have been other bikes in which only one of two mufflers is the actual muffler. There is a certain BMW (IIRC) in which one "muffler" is the catalytic converter and the other one is the actual muffler ...
 
thanks chris/cknowles for the info/details and everyone else for their input. this clarifies everything. i also received replies from virago tech and one member mentioned that there is a connection between the bottom and top exhaust which would explain the air coming out of both exhausts. though i would like to get more details on this.

i downloaded the manuals and the parts link is very helpful specially with exploded diagrams. thanks.

if i change the pipes to direct 1 to 1 (instead of 2to1), would i have to reconfigure anyhting with the bike? this just popped into my head and thought i'd also mention it here.


regards.
 
Aftermarket exhausts frequently warrant rejetting of the carburetors. The stock exhaust system is effectively a two-into-one design already. If the pipe diameters and lengths are in the ballpark then it's likely that there wouldn't be much effect on how the engine runs.
 
There's not much power to be gained by messing with the exhaust. Separate exhausts generally make more noise. You will need to rejet. The little V-Twin can sound amazing with the right exhaust mods.
 
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