Author Topic: a7ss head on a10  (Read 679 times)

Offline mike68

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a7ss head on a10
« on: 16.02. 2015 22:00 »
Looking for some advice if i can put a a7ss on my a10 which has a alloy head with the number 67-1571,the problem is this head is in a bad state with broken fins and it has had a poor weld/repair near the rh inlet valve spring and i have a bare head in good condition with 67-1122 which i believe is a a7ss head but this one has had the combustion chamber made bigger in diameter taking the step out by the gasket face to i would imagine fit a a10 at some stage and the valves seem to be the same size as the 67-1571.i have ordered 8.25 cr piston at 080" cheers mike

Offline mike68

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a7ss head on a10
« Reply #1 on: 16.02. 2015 22:08 »
Looking for some advice if i can put a a7ss on my a10 which has a alloy head with the number 67-1571,the problem is this head is in a bad state with broken fins and it has had a poor weld/repair near the rh inlet valve spring and i have a bare head in good condition with 67-1122 which i believe is a a7ss head but this one has had the combustion chamber made bigger in diameter taking the step out by the gasket face to i would imagine fit a a10 at some stage and the valves seem to be the same size as the 67-1571.i have ordered 8.25 cr piston at 080" cheers mike

Offline metalflake11

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Re: a7ss head on a10
« Reply #2 on: 16.02. 2015 23:44 »
Ran mine likes that for donkeys years, no issues.
England N.W
1960 A10
England

Offline wardleybob

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Re: a7ss head on a10
« Reply #3 on: 17.02. 2015 07:08 »
Done that a couple of times it works well.It gives you a good squish . Not to sure on what compression I used though.

Offline muskrat

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Re: a7ss head on a10
« Reply #4 on: 17.02. 2015 08:47 »
Go for it Mike. That's exactly what I have on the cafe (but higher 10.5:1 pistons).
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline Rocket Racer

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Re: a7ss head on a10
« Reply #5 on: 23.02. 2015 07:14 »
Go for it Mike. That's exactly what I have on the cafe (but higher 10.5:1 pistons).
Cheers

Ditto,
 my sidecars head was originally an A7ss one. The A7SS heads are typically less knocked around than the A10 Alloy ones

A good rider periodically checks all nuts and bolts with a spanner to see that they are tight - Instruction Manual for BSA B series, p46, para 2.
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