Volt spike

[mr andy spanners]

Hi all, new steamer owner.
Im having a starting problem, i was told the bike had a new battery but the starter seems lazy and if it dosent go first time it wont go at all.
I thought i would check the charging voltage, im getting 14.5v - 15v at tickover and then it goes off the chart when i rev it, even when i have the multimete set on 200v.
This points me to regulator rectifier boiling the battery, but i see the steamer has an odd charging system, more like a car.
Does any one have any experience of this fault. The alt seems quiet.
Im going to the tt soon on the bike and need it reliable
Thanks

[Sidk]

Sounds like the regulator is  toasted.