I am new to the forum, but have been reading a lot of threads over the last year that have really helped me out. That is why I am here.
I have a 2008 Yz 450 that will start, run for a second, and then die like you just hit the kill switch. Then, it is phisically hard to kick start, like it is seized up. But after you try to kick it a couple of times, it frees up and starts again. Then it dies and does the same thing again.
I have checked everything I know that I think would cause this.
It is getting fuel and good spark
Valves are in spec
Cams are timed correctly
Carb is cleaned
Cylinder is not filling up w fuel
Piston, rings, and cylinder are visually fine and mic within spec.
I have it torn down to the lower end now, the rod has no excessive play in it(which I thought might be making it hang up, due to bad bearing)
I am just looking for suggestions before I tear the lower end apart.
Also, this is a low hour bike with the original tires still on it.
Thanks in advance.
Edited by Treeyz450, January 04, 2014 - 07:18 PM.