I have only 4400 miles on the bike and it just started missing gears once in a while. Now it has gotten worse. The problem is it wont shit from 4th to 5th but shifts to 6th and is hard to down shift from 6th .It goes from 6th to nothing after a lot playing with the shifter will drop into one of the lower gears. When in neutral it sounds like it might be a gear noise [faint] Thank for your time just want to know if I can fix this or take it to be repaired.