New (Old) ABC

Hello All

It has been a while since I had anything to post and so here is a summary of progress over the last couple of months.

First, decided to bite the bullet and make some new engine plates.



After a lot of quality time with my hacksaw and files I had a pair of nice new engine plates!



Next problem was that the swing arm itself was not straight and so once nice new roller bearing had been installed the pivot rod would not go through both sides. So the swing arm was sent off to a local machine shop to have the pivot straightened. Once it came back everything went together reasonably well.



At this point I should thank Woflgang for the various pictures of engine plates and bits that make up the rear mounting for the engine. Also Keith for information on the general arrangement of the spacers along the pivot rod and the rear mount. All very helpful.

I think I m going to tackle the rear wheel next.

Could I be cheeky and ask Keith for details of the spacers etc along the pivot rod? I think I have it about right but any confirmation would be very useful.

Regards,
Alan Taylor

Hallo Alan,
(Please excuse me, Keith, for jumping in here): I think that, ideally, the spacer tubes should be individually tailored to provide the best possible alignment of the rear-drive sprockets.
The middle tube is of course 5" long, to suit the width of the bevel-box. For the record, my L and R spacers (using original swing-arm bearing sets)are resp. 1 3/4" and 7/16" long. Over to you, Keith.
I'll be posting a G.A. of the whole swinging fork layout in a few days, complete with the 22 rollers!
Alan, I think you should wait with your spacers until your rear wheel is ready. ATB, Paul.

Hello Alan

I would agree with Paul on this. In my case I have fitted the swinging arm with modern ball bearings and although the centre spacer is 5" to fit between the engine plates, I made the left and right side to fit. The reason for this was the difference in the final pivot point thickness with the modern bearings and the original ABC roller bearing set-up.

Hope this will help?

Phil

Paul,
Many thanks!
Happily I have all the various elements as the machine was complete when dismantled. However I suspect some details were not as per original in this area, so information like this is very useful.
Regards,
Alan

Hi Al,
Webmaster Giovanni would prefer to put my drg. in the Articles section of our site, rather than in the Forum. So that's where you should look for it. Tomorrow, perhaps. ATB, Paul.