Ohoof. That definitely could have been worse.Ok I got the bike, I measured 63V at 70% and the charger has a cutoff at 67V (printed on it), it's on the high side.
But I have to confess my stupidity, I made a mistake, I'll have to clap myself for a while for plugging the positive cable into the 10 amp meter plug on my multimeter. It was quite a flash and the connector on the battery melted for 1/8 on one side. I cleaned everything and removed some leftover copper and tried it on the bike, the connection is still good it's not getting hot, but I guess I'll have to replace the connector on the battery in the future.
It didn't blow the fuse on the multimeter? I still, in 20+ years of electronics work, have never seen someone pop a fuse in their meter.