Roadside Recovery and Diagnostic Help

I've had to be recovered and towed home today

Diagnostics .....

• Bike started chugging
• Looked down and clocks were blank
• Rev counter wasnt responding
• Pulled over, stopped the bike
• Tried to start and it was obvious there was no charge in the battery
• Roadside assistance came and jumped it off a battery pack
• Multimeter dropped while bike was idling
• Towed home
• Put the bike on charge when I got home
• Left it 4 hours
• Battery reads 12.55
• Bike sweeps and fires up
• Multimeter drops from 12.55 to 11.55 in about 30 seconds

Personally I think and hope its the alternator

How do I check for definite or does the above point to the right characteristics
What else do I need to check for ?

 

The bike started off a battery pack at the roadside but the volts dropped
I'm getting a constant reading off the lead that goes from the stator to the rectifier with the bike off

I too think the rectifier is fried. I reckon its over charged and melted the plug

 

I'm probably going to upgrade rather than replacing like for like ... but yep as a test, its a great idea :upyeah:
Technology has moved on in the last 8 years and the Mosfet R/R is a big step forwards over the original .... so if it is the R/R then thats the way I'll go