I missed a comment from May from David mentioning motorcycle maintenance evening classes and asking about the Edinburgh area.
It would seem that evening classes mirror the school and college semesters so it is a good idea to keep an eye out for schedules as the summer holidays draw to a close and autumn starts coming in.
Edinburgh Council ran a Motorcycle maintenance evening class in Autumn 2014 from Boroughmuir High School and the new schedule may include similar when posted from 12th August 2015
West Lothian College in Livingston have a basic Motorcycle braking, steering and suspension course starting on 2nd September 2015 and on 3rd February 2016 their course on Motorcycle Electrics take place http://www.west-lothian.ac.uk/courses/basic-motorcycle-Electrical-trasmission
I don’t see anything listed in the Borders College prospectus for August 2015.
Looking farther away, North East College in Aberdeen have a motorcycle maintenance course starting 26th April 2016
These are all evening class “adult education” i.e. more recreational than career oriented. There are other day-release and full time courses that are better set up for a career in motorcycle maintenance but you never know!