I've missed the start of this course, but worth keeping an eye out for if you live South of Edinburgh. Scottish Borders College continue to run their Motorcycle Maintenance evening class "Know Your Motorcycle". I did an introductory version of this a couple of years back and it is good to get along and fiddle with someone else's bikes!
The evening class details are on their website , unfortunately I am a bit late in flagging it up as it started a couple of weeks ago, but it looks like they are running a 10 week course from Newton.
Now to see if there are evening classes nearer to home.