So does everything seem to work until the engine is warmed up? Once warmed - are you still reading 14+v? I would check the voltage regulator first. If you have the service manual then also check the rest of the charging system components once the bike is warmed up.
The electric starter doesn't ever work? Does it not crank at all, crank but not turn the engine fast enough, only make ticking sounds?
Is the battery well grounded?