Need some help with my Yamaha WR 125 X Basically my bike was running perfect no problems, but about two or three weeks ago, it has being playing up. When I go out on it, it is fine for about 10 miles, then when it gets to about 10 miles the bike looses all power and the engine management flashes... it does not flash a code however... it tends to do it more when I'm at higher revs... but it keeps doing it... I have tried the obvious things... replaced spark plug.. checked the connections... replaced HT cap and the ignition coil.. however it is still doing the same thing. Could any body help me out at all? Anything will be appreciated..