Please help me with my Ulitima 113

Hello, i was going out with my chopper today, ive put a 113inch ultima in it, just about 200miles. When ive had riding it for about an hour, i was riding in 60mph and then it just dies when i was braking for a roundabout. Tried to start it again but it ran ok when i gave throttle but died as fast as i didnt give throttle. Then i thought i have to drive the *** home so i had i higher rpm then usual, but it died on med four times. And now i cant even start the thing. The tank is half-full, when i look in the carb i can see gasoline coming in.

any ideas?

very thankful for help. sorry my writing but i am swedish...

Thanks, Peter. Stockholm.  

check for fouled spark plugs,also check to see if plugs are firing, coil connections
and battery connections.  

check for loose or corroded connections from battery to starter, starter relay
ignition switch, ground plugs to metal on engine after removing them and see if
you see a spark when cranking starter. check coil connections and ground connections  

It would of been nice if the OP filled us in on what the problem ended up being.