Thick flange barrels for A7

[steverat]

Good evening all.
I am considering the purchase of a mid-fifties A7 which has thin flange barrels.
I have owned several A10s and always understood the thick flange to be a safer option.
Was the thick flange ever fitted to A7?

Regards
Steve

[MG]

Hi Steve!
The A7 never had thick flange barrels fitted. There is much more material left in the spigots, around the flange area, because of the smaller bore diameter, hence it wasn't necessary.

[steverat]

Thanks MG, good to know!
Now I know why my search for 'thick flange A7' on Ebay was a bit fruitless......

[MG]

If you ever find one, then you should buy it right away, because most likely it came off a Daytona Shooting Star competition bike.  
They seem to have had special castings for those, 3/4 years before the A10 thick flange barrels were made. Note the very substantial flange (must be more than 1/2"), and 6 smaller fins, instead of 7 on the normal A7. Maybe they modified a mould for plunger barrels.  

Useless info of the day 
 
Cheers, Markus

[muskrat]

Your a wealth of knowledge MG. I wish I had those barrels when racing the SS, the thin flange gave way 3 times for me.
Cheers

[A10Boy]

Musky, you should have tried through bolting..................... 

[muskrat]

Still do, even thick flange.
Cheers