R75/6 Part 4. BMW Air Head Boxer, R Series service. Set Points & Ignition Timing.

BMW, Air Head Boxer, R Series service. 1975 R75/6.
This bike has been off the road for over a year.
THIS IS PART 4 of a series of six videos, they document the service work required to get the bike back on the road.
In this video, Part 4, I will show you how to change the points, set the points gap, then adjust and set the ignition timing.
The other videos will show in detail the following tasks:
IN PART 1:    • R75/6 Part 1. BMW, Air Head Boxer, R ...  
This video show clips of what’s covered in the other five videos, we will then prepare the bike for the service: Remove the engine crash bar and leg shields. I’ll show you the best way I have found to remove petrol tank. Then we will remove both carburettors.
IN PART 2:    • R75/6 Part 2. BMW. Air Head Boxer, R ...  
Drain and replace the oil from the engine, gearbox, shaft drive & final drive housing. How to remove and refit the engine oil filter. How to remove the Air filter and petrol pipe assembly.
IN PART 3:    • R75 6 Part 3. BMW Air Head Boxer, R S...  
How to completely strip, clean, and assemble the Bing carburettors, I will show you every air and petrol way within the carb and how to make sure they are clear. I won’t be using an ultra-sonic cleaner in case you haven’t got one, they are not an essential tool, but they are rather good at cleaning carburettors!
IN PART 4: See above
IN PART 5:    • R75/6 Part 5. BMW Build Petrol Pipe A...  
How to cut and build a new petrol pipe assembly. How to fit a new air filter. How to assemble the carburettors to the engine, connect their cables, and adjust float height in the float chamber.
IN PART 6:    • R75/6 Part 6. BMW, Air Head Boxer, R ...  
How to set the Bing carburettors to their basic settings, then tune and balance both carburettors as the engine is running. Last of all it’s a road test.