The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: GFlash on 29.07. 2011 12:45

Title: Identify cylinder head
Post by: GFlash on 29.07. 2011 12:45

Is a new member and wonder how I can identify the cylinder head if it is to A7 or A10, difficult to read the numbers but it is certainly 67 - then it's a bit difficult could be 261 or two unknown numbers, and then 61 someone who knows if any of these combinations are correct

Title: Re: Identify cylinder head
Post by: muskrat on 29.07. 2011 14:55

G'day Gflash, welcome to the forum.
                                                 Wot U got, where U from. Intro yourself.
67-1061 is A7 from 1954. Measure the combustion chamber 67mm = A7, 70mm = A10.
Cheers

Title: Re: Identify cylinder head
Post by: GFlash on 17.08. 2011 19:22

Thanks for the information, living in Sweden and i have bought a a10 Golden Flash from 1951, the cylinder and cylinderhead is a10 but it turned out it was with a crankshaft from A7 so the compression was a little bit low ;). i have bought an A10 crankshaft which I will send for grinding.
Front and rear mudguard is also wrong and the rear mudguard brackets are missing, someone who have these parts and would be willing to sell?
Also have a BSA M22 that has been renovated.

Title: Re: Identify cylinder head
Post by: bikerboy on 05.01. 2012 13:45

In case it helps a bit of info on A10/A7 cylinder heads

http://atlanticgreen.com/a10alloyhead.htm