Hello all new user and sv owner , could anyone sugggest what to look for ,have an 01 sv650 covered 12000 miles, when started from cold the bike backfires 4 or 5 times in the first 30 seconds then is ok and runs fine ,, has a scorpion can fitted, do not no any history of the bike but starts with no choke also,,, so seems airs getting in somewere so any suggestions were i should look first thanks Shane warks