Have you guys tried lithium ion batteries?

[scooterfan]

One little point about ignition switched on, the volts show "11.x?" Should be 12.6 basically no load with fully charged battery. Least it is on mine (X2).

I guess it depends on exactly where the the volt meter has been connected to. If not direcly to the battery, the lower reading could be the result of a voltage drop at the point where the volt meter has been connected to - while the reading at the battery itself could still be 12.6 Volts.
Remember -even  thin wires in the harness down the line can also cause lower voltage readings down the line.

[Mickelous]

Checked the battery's voltage and it was 12.something with it off and 14.something on and a bit higher at 3000 rpms.

[mousejunks]

That is a good result and pretty standard

[mousejunks]

OP since you have said you have trouble starting over, try wiggling the connectors on the start solenoid and the starter motor, as well as the relays behind the windshield cover

[stuo]

Minimum voltage with no load: 12.3 volts. Fully charged, no load: 13.0 volts. If your battery show less than 12.3 volts it's in need of charging or it's NG.