Ok guys, we went hunting this weekend and over the weekend I noticed the ATV getting harder to start and loss of power, Sunday I went to start it and it would not start, there is great spark and fuel getting to spark plug, oh yeah, I got my son to pull me and it started up, on the electric or pull start it will not start, what do you think guys rings, low compression?

 

only one way to find out, do a compression test and let us know.........good luck.

 

Well did a compression test today and I am getting 65psi, should be 114psi for min compression 146psi max 128psi standard, so looks like a top end rebuild.

 

let us know how goes for you........sorry for the bad luck....

 

Before you tear down Adjust values first It may be all its needs.Prolly intake value to tight because of an bad air cleaner in the past.IMO. Good Luck.get back with us.

 

Valve clearance is ok, did a wet compression test and the compression went up, so its time for a tear down

 

GRRRRRRRRR.

Well had the cylinder bored over and matching over size piston, but the F*****er still wont start, still only getting 65psi, I really need help here guys, anyone got any more ideas what this problem could be.

 

Did you get valves and the head worked?

Ryan

 

No the head is all original, gonna take the head apart and check the valves, by the way anyone know what size the rocker arm thread size is, I read in the manual that you need a special slide hammer to get the arm out, but I was thinking about some threaded bar with a big washer on the end, but I cant get a bolt the correct size.

 

Negative on knowing the thread size.

Make sure those valves are seated good though. I would have thought the problem was in the jug with the results of the wet test. I assume you did stagger the ring gaps.

Ryan