[img]i/expressions/face-icon-small-confused.gif[/img]My son was riding in the back yard, he told me the machine backfired and then he could not keep it running unless he held the throttel open.
I checked the carb once before about two years ago and replaced the oring around the needel and seat,( at that time we were getting to much gas, gas was leaking around the oring and over filling the bowl, causing it to flood and back fire. That cured it for some time. So I figured it was the same problem.
This time I purchased a needle and seat assembly for !@#$%^& $46.00. Replaced the needle and seat assembly. I was so sure this was going to fix it. It did not. Sometimes it will try to fire but only with the throttle wide open and then it only fires for about 2 seconds. I'm getting good spark. What the &@!! could it be. Some one told me I could have dropped a valve, but when I pull the plug and place my finger on the spark plug hole I can feel the vacum and then feel the compression. But if I dropped a valve I would think that the engine would not even try to run as mentioned above.

Please review addtional entries for more problems and insight:
http://forums.atvconnection.co...id/12/threadid/522572


http://forums.atvconnection.co...tid/12/threadid/522600