repair and maintenance

i have a 1997 sportsman 400 and it turns over but wont start. i have replaced the starter and battery and checked almost all connections. Can anyone help ?

I have a 1999 Polaris scrambler i bought off a guy and the gears are backwards? So reverse is now hi range and hi range is now reverse? If anyone knows how to fix that it would be greatly appreciated. thanks

i got my 95 polaris scrambler burried in the mud yesterday. it wont start, i changed the oil and the spark plug an cleaned out the carb. it starts for a second than dies. what else do i do to get it to run. what can i change. or what is wrong with it???????????? im lost an confused.

96 Magnum 425 Chain drive. AWD used to work. Plow snow with it. This past winter, the front right tire stopped working in AWD. The left front tire continues to work. Any ideas? I thought I may have stripped the gears so I pulled the front right apart and it all looks good.