I own a 1999 model Deauville and I am very happy with the ride and performance, however lately, and after the bike has been serviced, I have experienced on two occasions the bike backfireing. The filters, both Air & Petrol have been changed but could it it be more of aproblem than that. It oly occurs on start up on cold mornings, is it because I pump the throtle twice to get some fuel into the carb (I know shouldnt do it but it sometimes helps) please can someone give some ideas as I am not that experienced with engines and it will save me a red face when I take it too the garage. Many thanks.