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#701785 - 07/15/17 12:59 am Cracked frame  
Joined: Jan 2006
Posts: 1,838
JD Offline
Moto-Amish
JD  Offline

Moto-Amish

Joined: Jan 2006
Posts: 1,838
Maryland
I was working on my '70 BSA this evening in the basement when I looked down and noticed a little bit of rust on the back side of the right down tube, just above the forward engine mount. There's a crack in the frame! Is this something that any competent welder can take care of? How screwed am I?

Attached Files Frame crack.jpg

Josh
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#701788 - 07/15/17 1:19 am Re: Cracked frame [Re: JD]  
Joined: Aug 2001
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Rich B Online happy
Rich B  Online Happy



Joined: Aug 2001
Posts: 4,956
Stone Creek OH USA
Is the frame cracked or are you getting some rust bleed from the faint? BSA frames are pretty tough....


Life is too short to drink cheap, bad beer.
#701792 - 07/15/17 1:53 am Re: Cracked frame [Re: JD]  
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JD Offline
Moto-Amish
JD  Offline

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Hard to see in the photo, but definitely looks like a crack just above the weld bead.


Josh
#701840 - 07/15/17 3:58 pm Re: Cracked frame [Re: JD]  
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Peter_Joe Offline
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Peter_Joe  Offline
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You need to make sure that the frame is indeed cracked. If it is you have a problem.The reason is that the engine mount lug is brazed to the frame and you can't weld anything that was previously brazed. So the fix would be to replace a section of frame tubing and then braze the engine mount lug back on.

One thing that I noticed is that the frame tube is waisted above the engine mount lug. Possibly crash bars or highway pegs were mounted to the frame tubes which could have stressed the frame causing the frame tube to crack.



Peter Joe


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