1938 Panther M100 primary case repair

[Fazerruss]

Evening all, here's a little repair I did recently for a vintage bike. The owner fitted an o-ring chain which failed catastrophically and smashed the case to pieces.
Parts for 90 year old bike aren't exactly off the shelf so he we was a little distraught. Fortunately another good customer of mine passed him on to me so I could try and put it it back together.
Being old aluminium it wasn't the easiest to weld as it was full of impurities so lots of patience required. There were a couple of pieces missing because after an hour of searching in the roadside ditches he decided to bring back home what he had.
Turned out good in the end and you can't tell.

 

[Fazerruss]

 

[Fazerruss]

And there you have it.

 

[MattF]

That truly is impressive workmanship.

 

[Fazerruss]

That truly is impressive workmanship.

Thanks Matt

 

[selectedgrub]

That's some pretty awesome work right there.
Will be underappreciated

 

[More Amps]

Fantastic work! Can I ask roughly how long it took you? (I realise you may not have done the job straight through in one go, just curious)

 

[Fazerruss]

Fantastic work! Can I ask roughly how long it took you? (I realise you may not have done the job straight through in one go, just curious)

About 12 hours work

 

[DanZac]

And there you have it.

Thats a mighty fine bit of work there, befitting a nice looking motorcycle.

 

[Morris]

Hat well and truly doffed.

 

[Rannsachair]

Great work, I was trying to figure out how the damage occured,engine fall off a bench?

 

[nickk]

Great work, I was trying to figure out how the damage occured,engine fall off a bench?

O ring chain failed,he stated at beginning.

 

[pedrobedro]

Saved a proper old thumper and given it a bit more character.

 

[chunkolini]

Why would an o ring chain fail?

 

[doubleboost]

First class repair

 

[Rannsachair]

O ring chain failed,he stated at beginning.

Thanks, was struggling to read it on my phone, on my laptop now. I should probably wear the reading glasses I got last year and never wear!

 

[bricol]

Why would an o ring chain fail?

New chain, old sprockets?

 

[Robotstar5]

Why would an o ring chain fail?

Far East knock-off in a brand name box?, I've seen supposedly EBC branded brake pads fall apart on first use

 

[Fazerruss]

The most likely cause is the heat. O ring chains are designed as low maintenance but to run in free air space to keep cool. The owner wanted to run the primary drive chain without oil but the general consensus is it overheated and let go.
He's going back to a plain chain in oil

 

[Fazerruss]

This is what he fitted.



The standard fittment should be a plain Renolds chain.