Author Topic: pistons a7ss  (Read 853 times)

Offline britman123

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pistons a7ss
« on: 10.02. 2016 21:05 »
anybody know a source for a set of pistons for a 1954 a7 ss .040 oversize?

Offline wardleybob

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Re: pistons a7ss
« Reply #1 on: 10.02. 2016 21:33 »
Its a bit dearer but I use t160 pistons(you have to buy three ).

Online Topdad

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Re: pistons a7ss
« Reply #2 on: 11.02. 2016 10:59 »
Britman, have a look in services parts suppliers etc ,there's a manufactuer of pistons listed, no connection and never needed pistons so far but may help, Bob
" rules are made for the guidance of wise men and the blind obediance of fools"
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Online muskrat

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Re: pistons a7ss
« Reply #3 on: 11.02. 2016 11:59 »
wb, how do you get around the pin height difference? To use them I had to use A10 rods and shorten then a couple of mm.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline Peter in Aus

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Re: pistons a7ss
« Reply #4 on: 11.02. 2016 12:24 »
Hi Britman have a look at this site http://www.jp.com.au/JPPistons.html

Busselton West Australia
49 A7 longstroke
58 A10  SA

Online RichardL

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Re: pistons a7ss
« Reply #5 on: 11.02. 2016 13:12 »
Britman,

First,  *welcome*

I wonder how you happened to discover the forum. Google? We're always interested in knowing how a new member came to own their A7/A10 and, of course, photos are great.  Maybe you are so new to British bikes or computers that you are not familiar with the well-known online parts distributors. The first three that I just checked all appear to have the pistons you're looking for:

Britishonly.com
Degroot-bsa.nl
vintage-motorcycle.com

Let us know if you need more choices.

Having said this, I now need to check to see if we have a topic where all known online distributors are listed.

If you happen to have a ton of questions, no problem, folks here are happy to help. If you happen to have a ton of help to give, folks here (like myself), appreciate it.

Richard L.
Plan on signing up for the world-wide 2020 DISTINGUISHED GENTLEMAN'S RIDEon September 27, 2020. This year it's a solo or pillion ride in dapper attire. Watch website at https://www.gentlemansride.com for details.


Online BSA_54A10

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Re: pistons a7ss
« Reply #6 on: 11.02. 2016 13:23 »
Hi Britman have a look at this site http://www.jp.com.au/JPPistons.html
IF you use JP's and I use them nearly exclusively .
Do not under any circumstances fit the rings supplied with them.
They just will not bed in no matter what you do.
Stick them on evilbay and buy some Hastings, Hepolites. Wellworthy. Perfect Circle or Total Seals.
Bike Beesa
Trevor

Offline Peter Gee

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Re: pistons a7ss
« Reply #7 on: 20.02. 2016 06:41 »
Some are very expensive indeed but Lyford Classics (UK)  have cheaper made in Taiwan. You can also get the same ones but with better rings ( non Taiwan rings). Unless you intend racing your A7sss these should do fine. Otherwise you can look high and low and wont find many.

Offline rocker21

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Re: pistons a7ss
« Reply #8 on: 20.02. 2016 12:37 »
try these people, they have lots of pistons and are based in the IOM, i have just bought +.040 for my 1960 A7ss.
http://www.classic-motorcycles.co.uk/cgi-bin/ecom.cgi?Command=ListProducts&db_scid=116

Offline Peter Gee

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Re: pistons a7ss
« Reply #9 on: 20.02. 2016 19:33 »
Yes it's worth noting you need at least 8:1 for an A7SS, but not for an ordinary A7.