Chain clearance

[Worty]

Every day is a learning day for me

For us all mate, trust me!

[Craigy]

Every day is a learning day for me

For us all mate, trust me!

I feel like a first year in the A level class 😬

[Worty]

Every day is a learning day for me

For us all mate, trust me!

I feel like a first year in the A level class 😬

When it comes to these bikes, if you ain't got a Phd or equivalent (like 50 years of fixing them), you're going to be pulling yer hair out   Fortunately, the people on this Forum may not have the former, but do have the latter -  which is good news for me as I struggle to figure out the vagaries of British motorcycle ownership and maintenance at the best of times.

[Craigy]

I’m starting to realise……..quickly 😤

[Craigy]

Bike is back together, clutch seems good, still unsure about drive chain clearance at back or primary case. I’ll run it for a few miles to see if any sign of rubbing.
Still no info on where to get a narrower chain. Mine measures 20.1mm pins length, if a Renolds is 19.1, that’s only 1/2mm difference on one side 🤔
Another issue (rear wheel sideways  movement on spindle, maybe it was like that before (about 1/8 - 1/4”) I’ll have a look on forum to see if any info.
Thanks for all your help, much appreciated

[Worty]

Seems like quite a bit - definitely on the spindle you say?  Obviously the bearings would be first port of call I reckon.  Mine has a tiny amount of movement, just enough to detect, like the steering head bearings.

[Craigy]

Seems to be on the spindle. What else would allow movement? I’ll try to get pic

[Worty]

Seems to be on the spindle. What else would allow movement? I’ll try to get pic

Bearings loose in their housings, maybe very worn spindle - can't think of anything else that would cause the wheel to rock on the spindle without the spindle moving.

[Swarfcut]

 Later type full width cast iron type* has a stub axle carrier supporting the chainwheel bearing. The bearing is held in place by the circular retainer, looks like a big washer, 42 6105.  Wheel hub bolts to the chainwheel, so lateral stability is governed by this bearing and its support.

 Checking the basics for loose nuts and bolts is  taken as read, certainly the bearings are number one suspects, could be you have an assembly problem with spurious parts, spacer or even a bit missing. Loose bearing retainer in the wheel hub, worn bearing housing also possible.

 Service Sheet 212E provides a poor line drawing cross section of the hub. Use Drags online catalogue for basic part schematic diagram. There should be no lift, rock or sideways movement in the  hub assembly.

 Swarfy.


 * Variant indicated by current bikes owned.

[chaterlea25]

Hi All
If the bearing retainer inside the brake plate comes loose the wheel will move about as described
I have found on a couple of wheels that there was a very small hole drilled through the hub and retainer for a pin or safety wire.  Not easy to find 70 years later.
Or use thread locker on the retainer

John