Atlas automatic timing unit

Nobody else has picked this up - not sure if it's a help - but the PO of my bike must have had the same problem. He tapped a larger thread into the unit and made up a larger puller. Thankfully he supplied it with the bike. Don't know if this was done on the bike in situ and if so, how. It would have needed a lathe at least to make the puller.

Previously stephen_orme wrote:

Help! I have a 1966 Atlas, the timing has slipped and I want to adjust it, but can't extract the ATU from the magneto shaft. The self extracting bolt has stripped the left hand thread portion that extracts it from the magneto shaft. I have spoken to Les Emery, who has supplied a replacement bolt, and suggests that I split the magneto chain and get a two legged puller on the back of the sprocket. This gives me two problems - first I have to disturb the valve timing, as the only way I can fit a replacement mag chain is by removing the cam drive chain first. Secondly, I can't see how this will help, as there still won't be space between the walls of the timing case and the sprocket to get an puller in, because of the back plate for the ATU. Has anyone any suggestions, or had a similar misfortune? If so, how did you resolve it and is it possible without disturbing the valve timing?

Well you do not need a puller you need two dog leg bar shaped like a L shape you if these under the ATU and push outward it with any luck lifts the ATU off But you have too lose your timing for the valve but do not worry there marked with punch marks on worm and intermediate sprocket and then marked on the cam sprocket you just have too get the all lined up again before you do the ignition timing 32degress before TDC fully Advanced . and you time the magneto with the plug lead nearest the battery box for Drive side or left hand side . some people get this wrong and say it dose not matter. But it dose mater! believe me

Yours Anna J