Kitty Cat Snowmobiles

MY kitty Cat will idle good all day long. As soon as you give it any gas, it bogs. I pulled the carb apart, and didnt find anything gummed up. I pulled the bowl off, and the jets appeared unclogged. Except for the jet that screws in from the top (pilot)? The holes are so small, i cant tell. If i choke it, it will rev wide open for a bit, ot when you remove the fuel line from the bowl, and reinstall it, start it up, it will rev high for about 4 secs and shut off. When restarted, it only idles, until you pull the fuel line off, and reinstall again. I removed the gas cap. Didnt make any difference. Please Help... Brad

The sled is about a 1996

Hold the choke half way closed, if it runs any better, my guess would be crank seals (usually ignition side). Its a common issue.