New to the forum! I just bought an 08 outlaw 525s over winter and i got it out today with the warm weather were having. After taking it for a short ride i noticed a pretty loud knock, generally while lugging it in reverse or first gear and a tiny bit while idling. I heard something about a crank bearing nut coming loose and making noise? Hopefully thats the issue but what else could it be. I dont know too much about these rfs motors yet but trying to learn. Any suggestions on where to start? Hoping it isnt in need of a rebuild. It was smooth every ride before this and sounded very healthy.