how will i know if i have an a10 or an a7

[asaff]

hi im new here and im from israel if it helps to anyone..
i have a bsa golden flash from 1959 and in its liences its an a7
someone who know good about bsa'

[MG]

Hello asaff and welcome!

If you let us know what the engine and frame numbers are I can look the exact type and year up for you.

Cheers, Markus

[spanersc]

Hi. The easiest way to tell is that a 500cc  A7 has 7 fins on the cylinder barrel (below the head gasket face) and an 650cc A10 has 8! The numbers on the crankcase can be misleading!  I once bought an A7 bottom end only to find out that it was an A10 built into A7 crankcases. Regards, Peter

[asaff]

o.k my dad just told me that someone changed the engine in our bsa..  

ok this is it.. there is still allot of work to do.. but its my project..

[asaff]

ok! i checked it and its an a10!!!!

[RichardL]

Asaff,

Welcome. That looks like a very good project. Is it currently in running condition? If so, we assume you are enjoying the riding. I think of it as riding a time machine.

Richard L.

[a10 gf]

One more country represented here, welcome, with hopes you'll find all the help you may need.
e