Well it seems I have the same story as everyone else here.
I replaced my battery a couple of months ago and it's dead already and the more I rode the flatter it got. I was down at Phillip Island for the MotoGp last weekend and my bike wouldn't start after the race, tho it had enough juice for the lights and an attempt at a start. So I roll start it and sit on an average of 130kmph on the way home. After about 40 minutes I start getting weird speed readings, the fuel light's on with a full tank of petrol and the engine light is flashing at me.
I finally get home (still ran ok), turn it off and turn the key back to on and there's nothing at all and the battery is almost hot enough to burn your fingers.
So my new battery is screwed and my regulator/rectifier is burnt out on the red and white connections.
Does anything cause this?
Or is the R/R just the weakest link in the chain?
Why doesn't it's fuse blow first?
The new battery (Yuasa) and R/R is going to cost me AU$480 so I just want to be sure it's not going to happen again if I can avoid it.
This seems to be happening to a lot of people ... is it worth a sticky?
P.S. With my battery out of the bike and after a jump start, my bike at idle reads between 14.5Volts and 15.5V at the battery terminals (mostly sits around 15V). When I rev it, it goes down to 7V and stays that way for about 1 minute before it jumps back up to 15V.
Is this a normal Voltage output from the Stator?
Most things I've read say it should have 14+V at 5k rpm.
Is 15V too high?
Or is it only reading that high because there's no battery in the ciruit?
P.P.S Gotta wait a week to get a new R/R