Oh man that makes much more sense. Okay! So, I simply line the scribe with a point heel and set that points gap (since the scribe represents the highest part of the lob on the points cam), then spin the scribe to the next heel, and set that gap. Correct?
Then, once that is done, I can connect a strobe light and flash it in the primary chain case port window to see how the timing is. If I notice it being off, then I loosen the points assembly plate or points plates to attempt to adjust to get the strobe lighting when the timing mark is right on the 28° mark.
I am doing more research but I have not found a very clear step-by-step for ignition timing with the original points yet. However, I am still digging.
I am confused on this point:
My current blurred understanding this is as follows:
Behind the points assembly plate is the spring loaded points cam unit, I believe known as the Timing Auto Advance Unit.
It sounds like you are saying that when setting the ignition timing, this Auto Advanced Unit springs and cam rotation should be as expanded as possible (simulating a high RPM running engine).
This obviously means that you are holding/locking the Auto Advanced Unit in fully advanced position while the bike is not running and you are try to set it all statically.
Finally, this brings my mind to imagine the correct procedure for points gap and timing would be as follows:
1. Take a deep breath, and be happy its a Norton you get to bond in struggle with
2. First, set points gap by ignoring piston stroke and crank degree of turn, instead, simply line the scribe on the points cam with a points heel and set that gap, spin engine to get scribe on next points heel and set that gap
3. Now the points gaps are set, its time to check ignition
4. Remove the exhaust and intake valve covers as well as the primary chain case port window to timing degree plate and mark
5. Rotate engine to get one piston on compression stroke (watch intake open close and piston rise in that cylinder to find this)
6. Go to port window and with bike in gear, rotate wheel to get the timing mark at the 28° mark which is BTDC
7. Lock the Auto Advanced Unit/points cam in its most full open rotated position ("fully advanced position")
8. Make sure a strobe is connected
9. Loosen points plate and rotate counter clock-wise, then clock-wise slowly until the points just open and trigger the strobe
10. For the next cylinder, check to see that when you roll the timing mark at 28° the strobe fires
I am not very confident on steps 9 and 10 yet, but that's where my head is at.
My biggest points of confusion is how to check/setup the correct points assembly positions.
When the timing mark is at the 28° mark and the Auto Advanced Unit is in fully advanced position. How do you move or adjust the points assembly to the correct position for correct timing? Once one cylinder is done, is the adjustment on the points assembly for the next cylinder different (since you do not want to disturb the first one you just set)?
