I seem to have a charging issue, I can't work it out.

Battery holds charge when optimate used.
12.8v
Bike starts fine, on 5k rpm, I get 14.8v, but it is inconsistent, sometimes it drops to 11.8-11.4v. This is probably the issue, but I can't work out why, as sometimes it is fine.

I have checked the reg rectifier. Negative to the three diodes is consistent (470) reversed is 0
Positive is the same across all three, reversed 0.

I have checked all connections, and all are good.

I would have thought it is the rectifier, but looking at the tests that can be carried out, it checks out good, so I am stumped.

This has only started happening since I changed some bits, put LSL bars on, so removed the switchgear, had to remove the mask, disconnecting all the connectors, however I have verified they are all connected correctly, 3 times...

I have just put on the hard wire optimate cable and noticed that the previous owner had one there, but it had melted the plastic, and the connectors were bare, I have obviously removed it, and tried testing without my new one connected to rule that out.

I didn't want to shell out on a new reg rectifier if I can't be sure it is that. Battery seems fine, I will get a new one but this seems fine at the moment.

Any ideas chaps?

I think it is a battery on it's way to failure. I have had more gremlins with worn out batteries than any other issue.

Tested it this afternoon, with the battery completely out, and checked all the wiring, connections from reg rectifier, earth etc.

Tested it, 12.8v, went down to 11.2 on crank, then sat at 14.2, revved to 5k rpm, went up to 14.8-15.0.

So it seems to have been maybe a bad connection somewhere.....

Battery now at 12.8, it was running for 20+ minutes.

Good