Author Topic: Broken Barrel fins  (Read 1185 times)

Offline bikerboy

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Broken Barrel fins
« on: 20.06. 2012 04:41 »
I wondered if anybody had an old set of big fin a10/a7 barrels as I have a broken top fin on mine and just need a donor fin


BSA A10 x 4
BSA A65 Lightning
Triumph T150v
Tribsa (A10 frame 750 Bonnie motor)

Offline Stephen Foster

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Re: Broken Barrel fins
« Reply #1 on: 20.06. 2012 07:04 »
You can use mild steel without any problem ..leave it  a bit too big to allow manipulation then grind to size after welding .
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

Offline Beezageezauk

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Re: Broken Barrel fins
« Reply #2 on: 20.06. 2012 10:21 »
Heyup Bikerboy,

If you can get a template to me I'll see if I've got a suitable donor fin about the correct size.  If I have I could shape it for you then post it to you.

PM me if you need more information.

Beezageezauk.

Offline bikerboy

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Re: Broken Barrel fins
« Reply #3 on: 20.06. 2012 13:34 »
Stephen

Good idea thanks

Beezageezauk

Its very likely I will take you up on that offer thanks very much


BSA A10 x 4
BSA A65 Lightning
Triumph T150v
Tribsa (A10 frame 750 Bonnie motor)

Offline shuswapkev

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Re: Broken Barrel fins
« Reply #4 on: 21.07. 2012 23:54 »
i have an old bbq plate...its a bit better than 1/8 thick...
and being tapered...is a great match for ajs triumph and bsa head and cylinder fins.....
 and theoretically a better match being cast iron...  ...i know mild steel works just as well..  but the tapered castiron saves me a bunch of grinding... i just braze it on...surpisingly easy... i use my little cutoffs as wedges to old the bits in alignment as the reconstruction is going on...
 actually...got the bbq plate form the bottom of a destroyed house...the bbq er tried to get one too many uses out of a ratty propane hose...

Offline muskrat

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Re: Broken Barrel fins
« Reply #5 on: 22.07. 2012 20:37 »
 G'day shuswapkev, welcome to the forum. 1/8" BBQ plate wouldn't last long down here. But good idea.
Say G'day & intro yourself in the app section.
Cheers
'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
Australia
Muskys Plunger A7

Offline shuswapkev

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Re: Broken Barrel fins
« Reply #6 on: 22.07. 2012 23:07 »
interesting??
why wouldnt a bbq plate last long...
esp as it has a bunch of bits already cut out of it???

and the bits match the motor out in my shed

Offline muskrat

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Re: Broken Barrel fins
« Reply #7 on: 23.07. 2012 09:37 »
 Nah, sorry mate. I mean as a BBQ plate. Mine is used a few times a week on a proper fire and is about 1/2" thick. ;) Us aussies luv a barbie.
Cheers  *beer*
'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
Australia
Muskys Plunger A7

Offline shuswapkev

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Re: Broken Barrel fins
« Reply #8 on: 25.07. 2012 11:07 »
1/2 inch???
   5/4 of us here in queensland have problems with fractions...
  and nobody here in queensland could afford having that thick of bbq plate shipped in from china...