I have a 2005 TRX500ES. When i am in 5th gear wide open, and sometimes 4th gear, the bike will stop shifting. On my screen the number 5 ( or 4) flashes and the bike will not shift. However, if i shut the bike off and turn it back on, problem solved. Until i hit 5th wide open again.has anybody had or heard of this problem, if so what is the fix?