I have no idea what the problem is, but i will tell you what i have done.

I took the engnie out of my sled to change the lines which are conveniently under the engine, connected to the fuel pump. Changed all of them, got a new throttle cable and put it on. Replaced the oil seal for the piston that controls controls oil flow into the sled. Changed the oil in my crankcase, flushed the anti-freeze, ajusted my carbs.

The problem is that when I start my sled (and which it start very well) it idles well for about 5sec then the idle rises to where the clutch ingages. So I checked over all my wires cables, adjusted my carbs to the lowest setting, didn't do a damn thing.

The first time I started it I held the oil lever up to make sure that there was no air lock. Thinking my plugs were oil fouled I changed them for a new pair** and it did nothing.

I was reading about how if the crankcase is not sealed right then it can rasie your idle. So if its that then I just make a new seal with a gasket seal and im good to go??

If you can offer any thing please help
Thanks