[AAAthreat]

Hello guyz
About 8 months ago i bought a 2nd hand Yamaha DT a 2000 model it started fine when i first got it then it became harder to start and wouldnt stay running unless the choke was out. We replaced the spark plug and that seemed to help for a short while but i took it down to a bit of open ground near my house recently and it was ok for about 10 mins when it stalled i tried to restart it and nothing happened.
So i havent been near in about 3 months then today i went out to see if it would boot over and no luck, i think there is oil in the can because when i first got the bike i would go up and down the drive. In the Haines manual it says that short journeys can cause a build up of oil in the can and to clear it you need to take it on a long journey. Since it wont even start now i cant do that does anyone know any way fixing this problem i dont not have alot of experience with engines or motobikes this is my first one.

Any help would be appreciated ta Craig.