1990 Kawasaki Bayou 300 Intake and Exhaust Pop

[marlon smith]

1990 kawasaki bayou 300c idles fine but pops out exhaust and intake when trying to excel, will not take throttle past 1/4 , any one had this problem?

have replaced carb twice, same thing, fresh built engine cylinder head, same as before, new spark plug, flywheel key is good, pulser test good, good spark

Edited February 24 by Admin
Long topic title, moved to Kawasaki ATV forum

[Gwbarm]

I would check the timing to make sure nothing moved while replacing the cylinder.

[Mech]

So it had this same problem before you replaced the carb twice, and did the head up ?

Initial impression, since it's popping out the inlet and exhaust, would be that your ignition is failing.. It might be that the ignition timing is going erratic.. I think I'd put a timing light on it and watch the timing and that the spark doesn't fail as I rev it up. Could be the cdi or a wiring fault.

You could also check the charging system is regulating as it should.

 

[flyinbrian365]

How were the valves, guides and seats when doing the top end? Did you adjust the valve lash to spec?

[Ajmboy]

Any change if you move the choke lever?