Hi, I'm after a bit of help here. A couple of weeks ago my KLE decided it wasn't going to restart when I stopped after an ten mile or so ride. I'd been riding it around for a few months before this without any issue. On this occasion it was definitely a flat battery and I ended up having to charge it for the bike's next outing. On the next trip out a similar thing happened after a trip of about twenty five miles (although it restarted twice on the trip when I stopped off for a couple of things). I've checked the battery after recharging it again (it is only six months old), and it is holding charge - currently 12.6v.
I suspect it is the rectifier at fault, but in all honesty don't know a lot about motorbike electrics! I've got a copy of the service manual, but the tests in it don't make a lot of sense to me! I know that when I run the bike, the voltage across the battery terminals slowly drops, so I know there is something afoot with the charging circuit. It also worth adding that when I bought the bike the rotor was damaged, and the stator and rotor were replaced with secondhand ones. both of which looked to be in good condition, so I don't think the fault lies there.
Could anyone offer me some advise, or simple checks I can carry out to diagnose what the fault may be? - I'll be really grateful!