Another exhaust Idea

[keithfzs1000]

weight dont give a hoot about am only 14st  :rollin and an extra couple pounds aint gonna make much difference, however performance wise if it makes the bike cough n splutter then idea out the window if it just reduces the top end or acceleration by a few mph who cares ?? it is still fast enough for me  if it loses 10mph lol
petrol hmm would it run richer two cans?? that is a concern with the price of juice now