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General Category => General Discussion => Topic started by: Turin on February 08, 2025, 07:44:24 AM

Title: mystery cylinder spacers
Post by: Turin on February 08, 2025, 07:44:24 AM

Head scratcher...Found these in my pile, can't remember why, what, etc. Looks like squarefin 1100. What did these come from?
(https://i.ibb.co/60b2N2mN/spacers-1.jpg) (https://ibb.co/60b2N2mN)

(https://i.ibb.co/KcMM5qW9/spacers-2.jpg) (https://ibb.co/KcMM5qW9)

(https://i.ibb.co/9mT0PdJh/spacers-3.jpg) (https://ibb.co/9mT0PdJh)

Title: Re: mystery cylinder spacers
Post by: guzzisteve on February 08, 2025, 08:25:19 AM

Could it be for a 82mm crank?

Title: Re: mystery cylinder spacers
Post by: Frenchfrog on February 08, 2025, 10:20:56 AM

Looks like some aluminum spacers for lowering the compression...like these from HMB?
https://hmb-moto.de/Cylinder-Spacer-for-square-engines

Title: Re: mystery cylinder spacers
Post by: Turin on February 08, 2025, 01:02:30 PM

2.06mm thick. They would work to drop compression. I don't know why I would have them.  :shocked:

Title: Re: mystery cylinder spacers
Post by: bigbikerrick on February 08, 2025, 06:15:31 PM

My 73 eldorado had those installed between the barrell,and base gasket. Oiginal owner said they were popular with the low octane gas in the early 70s to avoid pinging. I still have a set somewhere in my parts stash.
Rick.

Title: Re: mystery cylinder spacers
Post by: TOMB on February 11, 2025, 10:14:56 AM

I have a set brand new never installed.
Not sure what they fit but the default is Ambo or Eldo or T3
It would be a stretch but maybe G5 Convert

TOMB

Title: Re: mystery cylinder spacers
Post by: guzzisteve on February 11, 2025, 10:23:24 AM

I sold a set or 2 to a forum member last year or 2. They were thinner than yours and for an Eldo or Ambo for decreasing compression. Old stuff Harpers used to sell, I think that's where they came from.