99YZ400Starting/ running prob

My 99 YZ400 won't continue to run after the choke is turned off but starts fine, only if the choke is on. The bike has sat for a year with fuel in it. I know I f***ed up. Well I've drained the carb, put fresh fuel in it, oil/filter and coolant change. Any HELPFULL suggestions?

P Lewis

[ March 04, 2002: Message edited by: plew ]

is the air filter clean, try starting without it.

turn the idle up??? if none of these work, clean the carb. probably buildup in the jets.

Because of evaperating fuel that sits inside the carb for extended periods of time the fuel becomes a gel or even solid. The only fix for this is to take the carb out of the bike and clean out the jets. The jets have very small holes for the gas to flow through and when the fuel becomes a little crusty it clogs these small holes. From what you are describing it seems that your pilot jet is clogged.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now