OK Im throwing in the towel, I need help!
As stated, I have a 2000 Scrambler with a 2 stroke 400 DB racing engine(that part isnt important I just like to say it). It will not stay running for more then a few minutes. I have rebuilt the carb, I had a pinched vent line, and I have tinkered but I still cannot get the dang thing to stay running.

I have not checked to see if the oil cable is wide open, partly because the cable seems to move with the throttle and partly because Im not sure how to. On that subject how hard is it to bypass it and just premix my fuel and oil?

Any input or suggestions would be nice, just be gentle Im a newbie.

 

Have you checked compression? Rings could be loosing seal against cylinder when it gets warm?? OPT

 

Lord I hope thats not it!! That is way over my head.

 

do you know if the carb is flooding motor out? OPT has a great idea, check compression with compression tester to see if rings are shot.

 

Thats easy to check with a $25 gage. should be a min of around 110 PSI, good is around 130