Guys, This is a problem I am having on a 2001 440zr Sno Pro. The sled starts fine, but when I get 1/2 mile down the trail it starts bogging and I can't get the RPMS past engagement. I have to shut it off and wait for about 15 minutes then it runs another 1/2 mile and starts acting the same. Guys I have tried a lot of things, so I want to get back to the basics and I will welcome any and all suggestions.
Thanks

Sometimes when you havea a bad coil they stop working when it heats up try checking that, that would explain why it runs good cold.

coil or stator!

Guys,
I finally figured this out. I believe that there was a piece of plastic or something in the pickup line in the fuel tank. Looks like what was happening was that the float bowls would run out of gas and then the engine would get just enough gas to run. Anyway, I replaced the in tank filter, all gas lines, fuel pump and fuel filter. Wah lah, it runs like a top.
Thanks for all the suggestions
--Jason