bsummers12
01-19-2009, 02:39 PM
Recently I rebuilt my Daughters Boy friends 400EX. New piston, rings, valve guides and had the valves lapped. After putting it all back together I tried to start it. It would only run for a brief time, approximately 30-40 seconds. So I thought, okay maybe the carb is gummed up and the needle valve is sticking. I tore the carb apart and cleaned throughly. Re-installed it and had the same thing happen. So then with the advice if a friend I re-adjusted the valves again. Started it up and it ran for approximately 3-4 minutes and idle and high RPM and when I went to adjust the choke it died and I wasn't able to start it again.
Am I having a lack of fuel problem llike the bowl is running dry or am I getting to much air and not enough fuel? I tweaked around on the pilot valve some according to the manual lightly seat and back off 2 1/4 turns.
This bike is starting to frustrate me and I could use some additional guidance.
Thanks,
Brian
Am I having a lack of fuel problem llike the bowl is running dry or am I getting to much air and not enough fuel? I tweaked around on the pilot valve some according to the manual lightly seat and back off 2 1/4 turns.
This bike is starting to frustrate me and I could use some additional guidance.
Thanks,
Brian