Author Topic: Piston Ring 50mm X 2.5mm Villiers 1951 Monet Goyon  (Read 628 times)

Offline Totallyconfused

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Piston Ring 50mm X 2.5mm Villiers 1951 Monet Goyon
« on: April 12, 2023, 06:27:15 AM »
Hi, I am looking for two new piston rings, 50mm by 2.5mm.

They came from a Villiers 100cc, 1951 Monet Goyon engine.  I tried to attach some pictures but guess they were too big?

Does anyone know where I can get replacements from?

Thanks

Offline Vreagh

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Re: Piston Ring 50mm X 2.5mm Villiers 1951 Monet Goyon
« Reply #1 on: April 12, 2023, 07:49:56 AM »
Cox & Turner ltd, Yeovil. 01935 826818. Never failed me.

Offline 33d6

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Re: Piston Ring 50mm X 2.5mm Villiers 1951 Monet Goyon
« Reply #2 on: April 12, 2023, 09:29:10 AM »
Just remember it is not a Villiers engine made by the Villiers factory. It is an engine made by the Monet Goyon factory under licence from Villiers. Monet Goyon made a good engine but donít expect Monet Goyon and original Villiers parts to be routinely interchangeable. Youíll mostly be disappointed.
Making an engine under licence does not mean making a carbon copy. It means getting permission to use someone elseís ideas.
Best of luck with your search.

Offline Totallyconfused

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Re: Piston Ring 50mm X 2.5mm Villiers 1951 Monet Goyon
« Reply #3 on: April 12, 2023, 06:24:36 PM »
Many thanks for your replies.

It may be quite hard to find the rings.  The piston actually measure 49.71mm. The rings do not have flat ends, but are bevelled at a 45 degree angle.  There is a brass divider in the piston groove at a 45 degree angle to stop the rings spinning.

I was hoping that if I bought 50mm rings, I can cut the ends down at 45 degree angles and reduce the size.  Is this possible?

Offline Totallyconfused

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Re: Piston Ring 50mm X 2.5mm Villiers 1951 Monet Goyon
« Reply #4 on: April 12, 2023, 06:41:50 PM »
Some pics

Offline Totallyconfused

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Re: Piston Ring 50mm X 2.5mm Villiers 1951 Monet Goyon
« Reply #5 on: April 12, 2023, 06:43:04 PM »
Sorry having problems with pictures.

Offline Totallyconfused

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Re: Piston Ring 50mm X 2.5mm Villiers 1951 Monet Goyon
« Reply #6 on: April 12, 2023, 06:46:16 PM »
The engine....phew, got there in the end.

Offline Vreagh

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Re: Piston Ring 50mm X 2.5mm Villiers 1951 Monet Goyon
« Reply #7 on: April 12, 2023, 09:43:31 PM »
I'd still try Cox & Turner. They have supplied me with some really odd rings in the past. Just need all dimensions.

Offline R

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Re: Piston Ring 50mm X 2.5mm Villiers 1951 Monet Goyon
« Reply #8 on: April 12, 2023, 10:52:57 PM »
Villiers Services is another possibility. ?

They might even know if MG are different.
Might .....

Offline 33d6

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Re: Piston Ring 50mm X 2.5mm Villiers 1951 Monet Goyon
« Reply #9 on: April 13, 2023, 02:53:01 AM »
Yes,  the photos confirm my earlier remarks. A Monet Goyon engine with absolutely no original Villiers factory content.
Monet Goyon and Villiers had a good working relationship for many years. Monet Goyon started manufacture importing Villiers engines for their bikes and were very successful. So much so pressure was brought to bear so only French made engines were acceptable. Monet Goyon responded by obtaining a licence from Villiers to make their own version of Villiers engines. That is what you have, Villiers knowledge in a French package.
The suggestions offered are utterly practical.
Just stop confusing the issue by mentioning Villiers. Stick to Monet Goyon only.

Offline Totallyconfused

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Re: Piston Ring 50mm X 2.5mm Villiers 1951 Monet Goyon
« Reply #10 on: April 14, 2023, 06:34:36 PM »
Hi,

Once again, thanks very much for your replies.

Vreagh, I rang Cox & Turner today and spoke to Kit in the piston ring stores. He suggested I send him the piston.  I will send it on Monday, so fingers crossed they can sort me out.

They were very helpful so a great contact. Many thanks and will let you know how I get on.