How about the diameter of the stinger? I'm guessing the diameter will affect back pressure so is quite important, maybe i will be safe if i go for the original Honda diameter?
I know what you mean about it being loud, i can live with the carb/filter and tinny single skin but like to have a decent size silencer.
Btw, what is DBS?
Did you used to live out here in Thailand? How did you like it?

Cheers,