Ok, didn't want to use my TT card on this simple problem but it is getting annoying and I'm tired of taking it apart. It has sat for about a year (wife's bike) and I decided to get it running to sell. I replaced the gas Cleaned the carb and jets. Replaced the plug. Adjusted the valves checked the air filter. Removed the petcock and the filter was deteriorated so I just removed it for now and cleaned out the tank. It ran fine last time we had it out but now it cuts out when running fast. I wouldn't think it's electrical but dang, aint going to rule it out. I have repeated the carb cleaning process several times thinking debris may have gotten to the main jet but it is clean. Any ideas?