Contact breaker ponts set: setting 1968 Commando

Hi All.
I have removed the plate to change the distributor chain.
I will change the points but this is not the problem.
I need to understand better the points setting.
Particulary the distributor points cam compared to the camshaft/ TDC/BTDC.
Thank you.
Piero

pierodn said:

I need to understand better the points setting.
Particulary the distributor points cam compared to the camshaft/ TDC/BTDC.

Click to expand...

It's basically the same as 'camshaft' drive points except the rotation is clockwise.

http://britmoto.com/manuals/Manuals/Comm_man.pdf
pdf p.26

L.A.B. said:

It's basically the same as 'camshaft' drive points except the rotation i
s clockwise.

http://britmoto.com/manuals/Manuals/Comm_man.pdf
pdf p.26

Click to expand...

Hi Les,
thank you.
Sorry, help me again to verify if i have understand well.
I mus replace the "auto advance unit" as the picture n. 20, pag. 26, with the engine to BTDC 28 degree?.
Thank you.
Piero

pierodn said:

I mus replace the "auto advance unit" as the picture n. 20, pag. 26, with the engine to BTDC 28 degree?.

Click to expand...

Yes, the points cam has to be rotated and held at full advance as the auto advance unit is positioned and then the cam locked in that (full advance) position with additional washers (or the Fig. 21 washer) as the bolt is tightened (manual p.27 pdf p.26 "To reset ignition timing"....paragraph 6).

After the timing has been set on both cylinders the additional washers need to be removed and the bolt then fully tightened.