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Re: Rear chain touching on the inner primary case

Do you have the correct cork washer and spacer tube fitted to the footrest splined carrier?(behind the inner cover)..If these are incorrect (too short in the case of the tube, too thin in the case of the cork washer) the inner cover will be forced inwards when the footrests are tightened up...
Also, what make of chain do you have fitted?...Some Japanese chains are wider for a given size than European chains such as Regina and the space available is limited even when set up correctly...Ian

email (option): ian@wright52.plus.com

Re: Rear chain touching on the inner primary case

Thanks Ian for your reply. I use Regina chain, I use two cork washers for the inside tube spacer (one at each side) between the inner primary case the outside cover. Behind the inner primary case I use only a tube spacer and not any cork washers

Re: Rear chain touching on the inner primary case

I usually fit the inner cork washer behind the inner cover at the outer end of the first tube..That seals the cover from behind. I fit the other washer at the outer end of the tube that is inside the cases to seal that side.

To test the set up you have, slacken the footrest bolt completely so the cases don't have any pressure exerted on them. Remove the footrest as well if necessary to achieve this...Then reach behind the cover and test to see whether the inner spacer tube has any free movement axially, it shouldn't...You can just get to it by hand from underneath but you may perhaps need to use a long screwdriver or similar...

I believe the assembly drawing found in some BSA manuals is incorrect....Ian

email (option): ian@wright52.plus.com

Re: Rear chain touching on the inner primary case

Would it help to put the fish on the inside?

email (option): info@wetblast.nl

Re: Rear chain touching on the inner primary case

Seen from underneath. Ron

Scan-20190610-2

email (option): ronpier@talk21.com

Re: Rear chain touching on the inner primary case

Thanks guys I will add one more cork as Ian suggested outside and I will let you know.

Re: Rear chain touching on the inner primary case

Could also be a twisted rear sprocket or a defect bearing.

email (option): michasteinmann@gmail.com

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