Justgot a '99 Thunderbird w/22,000 miles on it. Cleaned the carbs & put new kits in them. It has a weird backfire-pop noise (is this normal for a triple?). Took a 400/500ml weekend trip w/it running about 70 mls/hr & it ran great. Parked it for two wks & took it back out. It has a bad hesitation pulling out & seems to be missing in after shifting into next gear. Drained / replaced fuel & added Sea Foam. It's still not any better. Any Ideas on the reason?