1919 to 1923 Sport model clutch

[Venus]

Does anybody know the original thickness of the clutchplates.
What matarial was used for friction.
I assumed it would be cork but it is not and the partlist reads "fiber insert".
I am also looking for a second gear, a mainshaft and a motor sprocket.

Peter

[Tommo]

Peter,
I have NOS clutch plates on hand and they have cork inserts that are 5/32 of an inch thick overall.
Can't help you with the other bits and no the clutch plates are not for sale.

[Venus]

Thank you for your reply, this is usefull information.
My plates are in good condition but i only need to replace the cork.
Can you tell me if the cork inserts are pressed in or are they loose or maybe glued?

Peter Venus

[Tommo]

They're a tight pressed in fit.
I've got an article on recorking clutch plates that will save me a lot of typing, I'll find it and put it up here.

[Tommo]

I got this from a magazine some time ago and don't know who to attribute it to.
I hope they don't mind me putting it up here but it does tell how to recork clutch plates in plain and simple terms.

[LouieMCman]

I have a spare clutch (also not for sale) that I'm trying to get someone to bond clutch material to instead of using the cork buttons. Even if I end up using one less disc it should work better. I've had my sport model for a number of years and the clutch keep getting worse. I'll let you know how it turns out.

[LouieMCman]

picture......

[Venus]

Dear mister Thomson,

Thank you for the article.
I found a company in Germany who has already cut the cork and selss on ebay, so that saves me a lot of work (and fingers).

http://shop.ebay.nl/?_from=R40&_trks...All-Categories

I will keep you informed about the progress.

Peter

[Venus]

also a picture

You can see that I am not ready to go on the road yet.
But I am getting there.
At the moment the bike is being spraypainted and I am working on the engine.

Peter

[LouieMCman]

Sport Model link currently on eBay...
http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT

[Chris Haynes]

Isn't there a more modern material that would do the job better?

[LouieMCman]

That's what I'm going for Chris. Modern clutch material bonded to the plates beats 132 cork discs in my book!

[Tommo]

Louie,
If you are changing away from corks you can now get someone with a water jet to cut the entire friction plate out of suitable material at a very reasonable cost.
It's amazing what modern machinery and materials can do.

[LouieMCman]

Good idea, I hadn't thought about that. Although I don't think there's a water jet within a couple hundred miles, It's something to look into, anythings better than making 132 buttons. Thanks.

[Perry Ruiter]

This is reminiscent of the late 60s early 70s when people where experimenting with Indian Four clutches with buttons of materials. I think Viton was what was eventually settled on and it worked well ... Perry