yea i got a ltz 400 and it sat for like 2 mouths and i got it out and electric stater will not fire it up i went out got new battery and spark plug but if i push start it it fires right up with no problem and runs good and after your drive it for 10 min and stall it elctric starter will fire it up i clean carb out and every thing what else should i do help plz

 

I would check the connections on your starter first make sure there all tight. If that is good then maybe replace your starter switch. Good luck.

 

well it cranks over good and has no troble and it getting spark

 

I am not on expert on the Z400, But you might go to the Gallery page and look up Mucky he has helped me out many time's. Check out his photo page while your there.

 

P.S. If he don't respond to your thread P.M. him He will answer you.

 

Sounds like a compression problem. Either a wore piston or the starter cannot spin the motor fast enough to get enough compression, or both.

 

Let me check for understanding.... it will crank over, and it does have spark, and itll only fire up by bump starting?
If thats the case, check the intake valve clearance, and do a compression check. My guess is the intake valve has tightened up, and now with no clearance, its being held off the seat and is dropping the compression. Very common on this motor, especially if its been over heated, by being run lean. On some of them the valve warp so bad, they need to be replaced.
So do a compression check, and if its low, adjust the intake valve back to specs, and recheck the compression.

 

check your fuel petcock in the tank, it only works with a vacuum from the carb, turn it to prime and see if it will start then, or you could still have a dirty carb. plugged jet, defective fuel needle valve or like what was said before stuck valve or misadjusted valves

 

either you starter is worn out or your connection for the elctric start

 

let me correct myself on the starter. it is probably not spinning the engine fats enough to start