Hi everyone  :  I’m not a painter & have cleaned with soap & water. I have the duplicolor paint/primer & wondering what easily available product to wipe them down before spraying?

Hello!
I´m about to set the ignition on my 1969 CB 750 sand cast and when I look trough the small hole in the ignition plate  were the points are I could only see a very small vertical line (2mm high) which is made on the aluminium crank case boss behind the timing plate. It  looks like the mark  is made by a chisel!? This chisel mark is only 1-1,5mm to the right  from were the aluminium boss starts and not in the middle of the boss like on the K1, K2 and K3 CB 750 models , and not as easy to see and well-defined.
Is this the timing mark?
Regards!
Jan Karlsson
Sweden

Sandcast 2860 is listed on Craigslist, but there is no information on the engine number. The seller is asking $31,900 or best offer. The bike has 12,162 miles on it. The ad says it's unrestored, except for the exhaust pipes, but the tank has obviously been repainted, etc. The VIN is not listed in the directory.

https://fayar.craigslist.org/mcy/d/garfield-1970-cb750/7764019350.html

Reading in the 91 distinction of the sandcast, there is a post of the adjuster having no holes like the newer adjusters have.
My question is when did the change happen?
I have one no hole adjuster that was on a K1 chopper frame and the other was with the holes.
I looked st the CMS parts fiche for the K0 and it references the holed adjusters, like on up to K8 have.

Back in the stand. Too wet and rainy for more paint. Sorting parts. All the covers have been polished up and I have a new set of the correct screws.