ok, i was riding in the snow and at the end of the day i heard a loud noise, kinda like a bad pully bearing. it is coming from the transmission and when it is in nuetral, the sprockit is pulling on the chain. the noise goes away when i shift it into the higher gears. i am completely stumped. what can make the sprocket move in nuetral?

 

i just sold my 89 blaster and something like that happened, when we opened it up we noticed that a washer looking thing was missing i guess that it was a lock to keep a certain part from moving, get a printout of the transmission from a site or a book and go through the tranny and check it reall good. GOOD LUCK HOPE YOU GET IT FIXED

~Chris