2001 Polaris sportsman 500 4x4

[Chase Cook]

I have a Polaris sportsman 500 and I just replace the piston in rings and head gaskets on it and I made sure the timing was exactly right it's getting gas and fire but it still won't start. It sounds like it has low compression but at the same time it sucks in air pretty good from the intake. Also the valves are adjusted to spec. It did start the first time I installed the Piston and Rings but it only stayed running for 5 seconds with starting fluid and then it shut off and then I tried to turn on the next day and it didn't do nothing and I've been going at it for three weekends now and it still ain't doing nothing. I wonder if i set the timing off a little or a lot if it would start up, because I inline the crankshaft sprocket with the crankcase timing line like it said in a manual and the two points on top of the cam sprocket to top dead center of the piston. I even took the spark plug out and stuck a camera light in there to make sure it was top dead center and it still won't do anything. AlsoI drain the carburetor some and shut d fuel petcock off to see if it was getting too much gas and that still isn't the problem. And where I live all the darn mechanics that work on Polaris ATVs are booked for two weeks which sucks and I need hope immediately or I'm just going to set the ATV on fire because I'm getting very frustrated with this crappy brand. Every other name brand ATV I worked on I got it running right and I replace the piston, rings and everything etc, and they started up fine. But this is starting to get very frustrated and I don't know who to talk to who had this problem before, who "don't have to come look at it". Cuz when they say that that means you're not going to come look at it until 2-4 Weeks later because there booked, which I don't have time for. Living in northern part of Florida sucks.