Ok guys, my issue is driving me nuts. It seems if my 420 "over-revs" (the best way I can describe it) the digital display where the selected gear shows a blank line and it will not shift up or down. I have to stop and shut the bike off, then start, in gear of course, then down shift to nuetral and give it a little gas. Sometimes I have to rock it back and forth to get it to shift after I have restarted. This happens in all gears and has even happened in nuetral once. I was told there was an adjustment I could make to resolve this. Any ideas?