Been having a bit of battery trouble for the last couple of weeks with the bike sluggish to start,and the lights getting brighter as I rev the engine.I expected it to be a shagged battery,as it is seven years old,but I dug out the multimeter and checked a few things anyway.And the winner is-------
Reading across battery terminals engine off and cold--13.3 V
Reading across battery terminals at idle--15.5 V
Reading across battery terminals at 5000 RPM lights on--19.8 V
Battery noticeably warm after five minutes.
Readings across alternator output wires all at around 85 V
Now 19 volts isn't vastly higher than the 15 odd in the spec,but it suggests to me the regulator is up the spout rather than the old battery.I tried the same test with a spare battery from an R1 in the bike and still got 19 volts at 5000 rpm so anyone got a reg/rec for a curvy going spare?One that works please.
