Originally Posted by Tourbus
Don't known if the DT400 oil injection system is the same as a early DT1-250.
On early 250's the oil control cable pulls the valve open. So a broken cable closes off oil supply. Bought one cheap with a seized engine from this happening. Prolly a good idea to check the cable once in a while.
I had one of those old 250's for a while in high school. That exact thing happened to this one but we caught it in time and just pre-mixed it from there. Good running little bike though! I'm going to go through this thing top to bottom before I start riding it much. I'd like to take it on some longer runs and ride it as much as I can throughout the year. It's survived all of these years and I don't want to be the one to fry it!!