I have a 1996 polaris sportsman 500. Last weekend we went riding on a very wet trail, some parts very deep. The bike started missing, by the time i got home i couldn't give it more than 1/4 throttle without it bogging down.
I've cleaned the carb, fuel pump changed fuel adjusted valves and it still bogs down. before adjusting valves I had 75 lbs. psi. this seems low but my p.o.s. manual doesn't tell stock compression.[img]i/expressions/face-icon-small-frown.gif[/img]

 

Gas vent line plugged?

 

no, cleaned them when i clean carb?
any idea of correct compression?

 

sorry i don't know the compression should be [img]i/expressions/face-icon-small-sad.gif[/img]

 

thanks

 

In my opinion a good compression should be over 120 PSI with the throttle wo. Did you do a wet and dry compression test?

 

I know this is stupid, and if you cleaned the carb you have almost certainly done this: is the air filter wet? I got my 250's filter wet splashing in some puddles and i couldnt tell by looking at it, took me an hour to realize that the filter was the problem. Same symptoms, though, bogged down after about a quarter throttle.