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poor valve clearance

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i am after a 2mm thick head gasket for my dommi 88. anybody making them to order?

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A compression/base plate under the barrel would be better, then you can get the same effect with a normal head gasket. Available from the usual suppliers.

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hi Stan,
i ve not seen anything on Andover Nortons website. so who do you suggest.
My engine is a little bit mix and match from different sources and the compression would be too high as it is.
Also a 1mm thick copper head gasket seems a little weak to me. i have read of using 2 head gaskets on a commando engine with similar clearance problems. Also, I would feel happier with 2mm thickness.

https://andover-norton.co.uk/en/shop-drawing/891/dommi-engine-500-600cc
See p/n 06.7171

https://www.rgmnorton.co.uk/buy/barrel-base-compression-plates-dominator-030-75mm_148.htm
out of stock but useful comment on fitting

I think you're asking for a blown head gasket if you go very thick or double up.
A 0.75mm compression plate + extra base gasket + standard head gasket will give you the equivalent of the 2mm head gasket you were after.

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It should be possible to find someone with scanning and lazer cutting facilities to make cylinder base compression plates . Many years ago a private individual did just that to provide us with a 5mm alloy spacer for a complex primary cover for a Kawasaki race bike ,allowing the use of a wider clutch.  A common modification at that time. Pistons and valve lifters travel  will need checking .

 



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