I am new posting here. But, I have been reading on this site alot for tips. Anyways, I got a 2000 YZ426f on a trade. It strated up fine after i change the spark plug within three cranks. I saw it was spitting out oil between the exhust manifold and the headers. I read on here that if it does that it's running rich or it's missing the gasket. So i bought a new gasket and the JD jetting kit for the bike. Now, After I installed the kit and the gasket the bike will not start....
I took the pilot jet out and sprayed it with some carb cleaner. Did the same with whole carb… BUT, when I cleaned the whole carb, I sprayed the valve seal that sits on the plate. It got brittle and some cracked off. So, it’s not sealing properly. You think that’s the cause for not starting up?
It's the one that goes around this plate in the picture. How important is the seal on the plate and what is the main purpose?
Things I check and confrimed;
There is fuel coming in… I drain refilled.
I used the JD fuel screw with the old spring, washer and O-ring it that same order
The AP squirts out gas.
There is spark.
The plate is on correctly. with the hole facing towards the needle
Edited by Lahi671, April 10, 2012 - 09:47 AM.