alright...so my dads bike has been having a lot of trouble recently. bike has about 12K on it, it sat for a long time. during mild/hard acceleration around town or from a stop the bike backfires and misses a good deal. There doesn't seem to be any carb adjustment screws. We found one adjustment screw for the pilot jet we adjusted it some but it didnt seem to help much. Anyone familiar with these bikes/problems? also, sometimes when idling the tach....goes "tachy" as in in flutters some when the engine stays at a normal idle. The bike seems to run much better when it is cold/choke on.