So it seams i need my Suzuki Sv650 re-jetting, Carb sync and general tune up.... All because of my new exhaust!

After a bit of research on where to take my bike i ended up calling JHS Racing in keynsham who are suzuki specialists. For a re-jet kit fitted and tuned with an advised air filter upgrade i was quoted nearly £480! Does this sound about right?? The bikes a 2002 and only has 4000miles on the clock, can a simple slip on exhaust make such a cock up?

Anyone recommend any other local companies to try??

Cheers Jamie