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New 17T / 20T piston for sale.

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New 17T / 20T piston for sale.

Post  rob spence on Tue Jan 02, 2018 12:27 pm

I bought this in error as I had to got to 20 thou over in the end.

This is a brand new old stock standard size piston with rings, pin and circlips. Price is 80 including postage...I am not making a profit on this, this is the exact price I paid just 4 weeks back.
Fits 20T and 17T.
Many thanks.

rob spence

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17T/20T piston

Post  piston 197 on Tue Jan 02, 2018 1:55 pm

Rob , if it has a cut out in rear skirt it will fit 17T engine to number 17T 3032,but not 20T, if no cut out it will fit 17T after No 17T 3032 and ALL 20T engines

might be worth letting the potential buyer know, the one for the 20T and late 17T is a very difficult piston to source, the earlier one less so

JH
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Re: New 17T / 20T piston for sale.

Post  rob spence on Tue Jan 02, 2018 2:39 pm

Thanks JH there is no cut out in the skirt.
Here are 2x pics. ( looks a bit dirty but it has a protective grease on the piston)...comes with the original paperwork.





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Re: New 17T / 20T piston for sale.

Post  rob spence on Tue Jan 02, 2018 2:51 pm

I also have a 17T barrel in great nick which needs a hone but is of standard bore.

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Piston

Post  piston 197 on Tue Jan 02, 2018 3:26 pm

Yes Rob, that is the hard to find one, fits all 20 T engines and 17T engines after No. 17T 3032

JH
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Re: New 17T / 20T piston for sale.

Post  rob spence on Tue Jan 02, 2018 3:27 pm

Thanks JH

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Re: New 17T / 20T piston for sale.

Post  bill2b on Sun Jan 14, 2018 7:45 pm

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Re: New 17T / 20T piston for sale.

Post  rob spence on Sun Jan 14, 2018 8:38 pm

Seems to be except the ebay one seems to be a used one. Mine is brand new.

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Re: New 17T / 20T piston for sale.

Post  rob spence on Thu Apr 12, 2018 5:19 pm

Still for sale.

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Piston

Post  kerabo on Fri Apr 13, 2018 4:03 pm

John
What happened to the 17T after that number so it has a different piston.

I was tempted with this sale as a spare but then realised its Standard and both of mine have been bored.

Regards Ken
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Re: New 17T / 20T piston for sale.

Post  Cruiser79 on Sun Apr 15, 2018 10:00 am

kerabo wrote:John
What happened to the 17T after that number so it has a different piston.

I was tempted with this sale as a spare but then realised its Standard and both of mine have been bored.

Regards Ken

Direct from the Goddard book "Engines numbered up to 17T/3033 inclusive had a slight cutaway on the piston skirt which limited the effective length of the piston. In consequence, the selective assembly of the piston and bore became more and more critical in order to reduce the general level of piston noise. A method of dealing with this was to use a full skirted piston which in turn entailed a modification to the design of the cylinder as regards the height of the induction port"
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Piston

Post  kerabo on Sun Apr 15, 2018 2:44 pm

Thanks for that info
Ken
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Re: New 17T / 20T piston for sale.

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