Need help I was out riding Sunday and my I went to shift into 4th and it just revved so I thought I might've put it into neutral but I down shifted and samething so I stopped the bike and checked the chain bcuz I thought it probably broke or came off but everything was fine so I put it into first with the bike off and pushed it and it rolls and the bike still starts as it should and sorry if it's a dumb question but I'm new to this kind of problem and thanks in advance for any help 👍