Welcome to the site, Dale.
I took the stock mufflers off my '03 Speedy about 2 years ago and put on JCWhitney 16" shorties.
Pretty much a straight-through pipe.
Fourteen thousand miles later, I still haven't "gotten around to" rejetting.
No problems. Doesn't overheat in a Florida summer, nothing.
The bike runs like a champ, and is lighter by about the weight of a case of beer.
I'm sure it would be better after a rejet, but it won't damage it.
