Suzuki GS400 Exhaust

[Guest]

Hi, im planning to change the muffler on my Suzuki GS400 '79 she has now an aftermarket 2in1 no name on it,im looking to get a better sound,ive looked to this muffler http://www.ebay.co.uk/itm/CHROME-SHO...item5670525c42 its open but have a buffler included i think it will help to have some back pressure an not a too screamy sound (i like it a little deeper)
have anyone experiences with short muffler like this?
the bike have the stock air filter setup and dont want to change to open filters 'cause i ride in the rain and dont want to use too much fuel or run lean,if i change to this muffler do i need to change just the main jet(not the pilot?!)? and how much do i need to increase the size? im not sure what jets are now on the bike( i think the stock) but i can check.
ill appreciate any help

[steve murdoch]

I don't know that muffler specifically but if you run it with the baffle i think the stock jetting and airbox will be fine.
It could be the previous owner already rejetted for 2-1.