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Advertising and Classifieds => Douglas Motorcycles and Parts Wanted - Private => Topic started by: saluki42 on 14 Sep 2020 at 12:49

Title: 4 ring pistons
Post by: saluki42 on 14 Sep 2020 at 12:49
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
Title: Re: 4 ring pistons
Post by: Dads bike on 14 Sep 2020 at 15:44
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
Title: Re: 4 ring pistons
Post by: saluki42 on 14 Sep 2020 at 16:10
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
Title: Re: 4 ring pistons
Post by: Dads bike on 14 Sep 2020 at 20:45
No problem have just sent a PM