Author Topic: 4 ring pistons  (Read 426 times)

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Offline saluki42

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4 ring pistons
« on: 14 Sep 2020 at 13:49 »
Does anybody know of a supplier for the original type 4 ring pistons to fit the 600CC range. Or in desperation of a firm that can manufacture to order very small numbers. I am working on the restoration of a Model Z and want to do all I can to make it as original as possible.

Thanks
Chris

Offline Dads bike

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Re: 4 ring pistons
« Reply #1 on: 14 Sep 2020 at 16:44 »
Afternoon Chris

I am unsure of the bore size of the 600 Z, is it 74mm
I have a pair of hepolite at +30thou
Send me a PM if you think they may work for you.

Steve

Offline saluki42

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Re: 4 ring pistons
« Reply #2 on: 14 Sep 2020 at 17:10 »
Thanks for that Steve but as far as I can fathom the Model Z used 68mm pistons and my poor thing has already be overbore by 0.100" to take BSA golden flash pistons.

Chris

Offline Dads bike

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Re: 4 ring pistons
« Reply #3 on: 14 Sep 2020 at 21:45 »
No problem have just sent a PM