My buddy picked up a 1970 Suzuki T250 two-stroke street bike and we're trying to get this thing on the road. It will start with starting fluid blown in the carbs and run if you keep it throttled. If you let the gas off, put it in gear or turn the choke off, it dies, also, when you are starting it, gas blows out the back of the carbs. Clearly, the carbs need to come off and be soaked, blown out etc. Can you guys offer any advice as to what these symptoms speak to as a root problem? Thanks, looking to get this little screamer on the streets soon.