Muffler replacement

[GS750GUY]

On my 78 GS750EC the under side of both mufflers are pretty well shot with thin spots and several holes that have rusted through.
I've been researching the Italian made Sito replacements and they seem to be high quality, the price seems to be pretty good, and those that I have talked to that have used them seem to like them. So I'm going to keep an eye out this winter to see if possibly the current state of he ecomomy will create some bargain prices for these.
The Sito mufflers seem to be very close in appearance to the stock mufflers. Do any of you feel they are close enough to stock that I will probably not have to do any jetting changes or fuel or air adjustments?
I keep reading that I probably will need to, yet on the other hand one guy writes and said he used Sito replacements and had to make no adjustments at all.
I appreciate your thoughts.
GS750GUY

[Nessism]

How about a link?

[tas850g]

i've been looking for aftermarket 4 into 2 replacement exhausts and i have found one from Dennis Kirk - Sito mufflers. The only question i had was the exhaust would fit a '78 or '70 to '81. I know there is a difference between the '79 and '80 exhaust. The '80 had an "H" connection underneath whereas the '79 is separate/straight between the 1 & 2 and 3 & 4th exhaust. I've been told the '80 "H" would fit but don't know what mods would have to be used to make the fit.

[uudfourty]

Probably not any.

I don't know about mounting further back on the machine-- how close to the same that is, but you shouldn't have to do anything to accommodate for the H.

I think...

[Nessism]

Found this on the Jama system... http://www.laser-exhausts.com/wp-con...2008_GS750.pdf
Looks pretty good to me.

[rustybronco]

The Sito mufflers seem to be very close in appearance to the stock mufflers. Do any of you feel they are close enough to stock that I will probably not have to do any jetting changes or fuel or air adjustments?

I appreciate your thoughts.
GS750GUY

The Sito that was on my '78 Honda was an exact replacement muffler for the HM300? OEM. other than the name on it you couldn't tell.
alas, it was rusted out, so I replaced it with the correct one the came with the spare parts for the bike.