I recently purchased an 88 vn750 and the bike had sat for 2 years. Right before the guy put away he had $1300 in tune ups done to it by a mechanic that i actually use as well. After he had the work done he said the carbs would surge and eventually flood out, so he put it up after only putting 500 miles on it after the tune-up. The carbs were rebuilt within that tune-up and the mechanic said he remembers that it ran very well back then.
Well when i bought it it ran "ok". I did all the things you should do when you buy a vehicle (oil, plugs, etc,etc) and rode the bike up and down the street. it had hesitation and would flood eventually, like the previous owner said. There was also small amounts of smoke coming out of the right exhaust. I had the carbs pulled and cleaned very well and put them back on the bike. It ran great but then after about 30 minutes it started smoking again, but in a smaller amount. The next day i tried to ride it again to see what it would do and after it warmed up it wants to die when i give it any throttle. It also will only run with the choke on (which is a sign of the pilot jets being clogged? im not 100% on that though.)
Sorry this is so long but i have been researching in the website and i cant come to a conclusion on what is wrong so i decided i would state the whole case to see if some of you guys may know whats going on lol. Could it be out of sync? The mechanic said he would check the adjustments but i have not tampered with them and neither did the previous owner. what is this a sign of when it dies when i give it throttle?