This is what happen to my drum where the circlip sits as you can see the outer circlip mount has broke away with only about 15mm left, which made the backing plate rub aganst the drum.

Ashley

Thanks for all the great input guys.

So three issues to summarize:
1. Shimming issue on front primary case
2. circlip part number 47 may not be in place? Per Bob & Ashley (to answer Ashley the dummy axle part 44 was sloppy but didn't see the cir clip 47 p, as I didn't remove the wheel bearing spacer part 23)
3. possible rear inner spacer round the wrong way (per Dave, hence locking when tightening right hand axle)

Other stuff discussed like the shoes could be swapped to lean in, but actually from memory they seamed to lean in ok.

So this weekend I plan to attack the rear wheel, leaving the shimming issue on front primary for stage 2 ( next weekend).
So I investigate no 2&3 this weekend and see how I go.

Thanks a lot for the great input and I will let you all know the good results in due course!

Hi

You won't be able to see the circlip as it is behind the dust cover so you will have to pull the dust cover out to check on it.

Ashley

[quote="Pjr1440"]Thanks for all the great input guys.

So three issues to summarize:
1. Shimming issue on front primary case

The circlip out of place is allowing the drum to move to the left which in my case also caused rubbing on chain guard but I think in your case it may also be what is causing chain to rub on inside primary case.
I think reinstalling circlip will solve rubbing of primary inside case.

Bob

Pulled the rear hub apart, sure enough cir clip 47 was not in place correctly for no reason other than had not been installed correctly in the first place. The fascinating thing is that after hours of pondering why I had more parts on the bench than shown in the exploded diagram of the brake drum sprocket, we finally realised that the previous owner (bless him) had decided to install an additional washer, no doubt to compensate for the fact the cir clip was not inserted, and the components had all shifted to the left allowing the dummy axle to flop around loosely, so to fix that had added a washer on left side of the dummy axle, which pulled up against the Rear of the brake plate (part 13). The give away is the original photo showing a suspiciously clean circular area on the rear brake plate (you can see it in my first photo between the drum brakes).

Anyhow took it all apart and then reassembled all parts on exploded diagram (even the circlip pt 47), low and behold no more scraping sound, chain has moved noticeably to the right, no longer so close to rubbing the chain guard outer, and the angle now improves the clearance of the chain on the primary case, chain link no longer clips the case as I rotate the rear wheel!

So one spare washer left in the tool box, but all seems present and accounted for. Further wheel no longer locks up on tightening the right hand wheel nut, I have it very tight now no worries.

Took her for a ride, goes like a rocket! She had developed a wobble if I only had one hand on handlebars previously, ie when adjusting visor she used to have a tendency to do a kind of handlebar wobble, now all fixed she is stable!

In a couple of weeks I will look at the primary case shims as I checked clearance of the swing arm, while the rear wheel was off and the swing arm is touching the primary case, so I need to fix this.

Anyhow significant improvement made and now safer, I am sure! Thanks to all for your good help as I needed it

Correction, due to circlip 47 not installed correctly, all parts in brake drum sprocket had moved right not left..... I think, rather confusing anyhow it was wrong!

Good deal.

Dave
69S

DogT wrote:Good deal.

Dave
69S

And thanks for your observation Dave from the posted photo that the swing arm appeared to touch the primary case, as on taking another look over the weekend you were right!

Good to see that it was a easy fix, now to the next fix up, and enjoy it even more when you get it right and taking it out for a run.

Ashley

Pjr1440 wrote:
In a couple of weeks I will look at the primary case shims as I checked clearance of the swing arm, while the rear wheel was off and the swing arm is touching the primary case, so I need to fix this.

Before you dig too deeply into the primary, try just loosening the mounting nut for the cover and see if the inner cover moves away from the swingarm. The flat surface of the inner cover is very thin. If the cover mounting nut is overtightened it can bend the inner to the point it fouls the chain or the swingarm. I found that some Hylomar in the grove for the o-ring and a new o-ring meant I could get away without cranking down on the nut to get a seal. Loctite on the nut kept it together.

rpatton wrote:

Pjr1440 wrote:
In a couple of weeks I will look at the primary case shims as I checked clearance of the swing arm, while the rear wheel was off and the swing arm is touching the primary case, so I need to fix this.

Before you dig too deeply into the primary, try just loosening the mounting nut for the cover and see if the inner cover moves away from the swingarm. The flat surface of the inner cover is very thin. If the cover mounting nut is overtightened it can bend the inner to the point it fouls the chain or the swingarm. I found that some Hylomar in the grove for the o-ring and a new o-ring meant I could get away without cranking down on the nut to get a seal. Loctite on the nut kept it together.

Sounds good, will do. Given one extra washer in rear hub, and the fact that when I changed the oil filter it was so tight that it took a large screwdriver inserted three times with three guys hauling on it to unscrew the filter, never know my luck with this tip!

Thought I would give a quick update on progress....l

1. Rear wheel started scraping again. Pulled apart again, and put in new circlip no47, also realised that washer no 21 was missing (this was the in correct one I removed last time - not even close to correct size or thickness), so ordered one and installed. Now appears all good.

2. Visually confirmed shims in place behind main primary bolt. Loosened off the primary nut ( hmmm that was very very tight) and the inner primary did move out further away from Chain, and left more space from the swingarm. Changed primary oil, checked for cracks, no worries there.

Then I changed oil, polished her, compression tested her and all good with two pots registering 120psi, but broke throttle cable on last compression test kick. Ordered new one, arrived brocken. Ordered another..... Will arrive new week.... Finally I am busting for a good ride it's been a while!

Thanks for your help on these problems guys, made it a lot easier!

Pjr

Thanks for update and good to hear getting close to the road.
Feedback is usefull so we know what ultimately solves problem so when similar symptoms come up with others we have a good idea what advice to give for solution.

When you installed circlip did you set it so the sharp edge is pointing to outside to best resist slipping out?

Bob

rx7171 wrote:Pjr

Thanks for update and good to hear getting close to the road.
Feedback is usefull so we know what ultimately solves problem so when similar symptoms come up with others we have a good idea what advice to give for solution.

When you installed circlip did you set it so the sharp edge is pointing to outside to best resist slipping out?

Bob

Well I specifically looked at the circlip knowing that the advice is to install sharp edge out, but both sides where the same. It was a new circlip from old britts. Of interest the old circlip was significantly more compressed, ie the distance between both open ends was larger. It took quite a lot of effort to get it to clip into the grove. I think the trick is to put it in the grove with no bearing in place and measure the gap on the open end of the circlip. Then install the bearing and circlip and check the gap, this encouraged me to keep working it in for some time till it finally clicked in correctly.