missing

Hi Everyone I've got a '93 twin carb (Mikuni Carb) 400SS ex Japan model. I have a problem with the bike where at low revs (below about 8,000rpm) it's fine, but anything over that it coughs and splutters. I have pulled the airbox cover off and replaced the air filter, and have found lots of fuel...

Ok, so I apologies in advanced as several similiar issues have been posted in different places but I wanted to throw out my specific situation I am encountering now. I bought the 08 base 1098 model and it only has 6K on it total currently. Perfectly taken care of and I have service records of...