I'm looking for a 12mm spacer to increase the size of this chamber for a better bottom end.
Does anyone make them or know where l can buy one ?

Thanks

Oh, here's a pic of the bike in 1987, I found the original owner...

Spare cover on the way to make my own.david wrote:If you can't find one, how about getting another cover and machining the fins off down to the bolt surface. Make your own.