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Old 11-27-2012, 03:54 PM   #1
Gixxertj1819
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Welding question?

I was told that you couldn't weld on the crankcase because it is cast aluminum. Is this true or can it be done


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Old 11-27-2012, 04:03 PM   #2
Ril3y
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Re: Welding question?

What exactly are you trying to do/what happened?


Trying to repair a hole from a connecting rod and welding a tab aren't the same. Depending on what you have and what happened, I may be looking for a new one..

Last edited by Ril3y; 11-27-2012 at 04:07 PM.
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Old 11-27-2012, 04:13 PM   #3
tlee2989
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Re: Welding question?

cast in itself is hard to weld. its bascially "pot metal" they have a mold poor liquid material into it and let it harden up. it makes a solid uniform product but the problem is that it also has imperfections, dirt, trash, and other impurities that make it hard to weld.

it can be done but its extremely hard with aluminum it has to be clean clean clean and then you have to find a decent enough aluminum welder to do it. aluminum is one of the hardest metals to weld IMO
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Old 11-27-2012, 04:39 PM   #4
Gixxertj1819
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Awhile back my chain broke and on the crankcase it broke the tabs where the clutch/sprocket cover screws go in. I need to weld more tabs on it


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Old 11-27-2012, 04:54 PM   #5
oshweeken
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Re: Welding question?

Yes, you can do it! It will most likely not be a pretty or a very strong weld though. You may have to try different rods to see which will work best on the blend of aluminum.
I have welded a cylinder wall that is off a 2 stroke, completely saturated with oil, ground out a V and then filled it. The weld is holding (not pretty) and leak down test shows no leak, but through a small pin hole I have some oil leaking out when it's running at 13K RPM.
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Old 11-27-2012, 05:11 PM   #6
Iloveurmommy
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I welded those tabs on my 02 600, they're not that bad. Just do a very good prep job and if the motor in a running bike, remove the battery so u don't fry the electricals.


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Old 11-27-2012, 05:44 PM   #7
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Re: Welding question?

Find an aluminum welding specialist. The side stand bracket snapped off the frame on my aprilia. Got recommended someone by three different people. He done a perfect job. He used a welders battery isolator so he didn't need to remove battery.

If your in north London check out Laurie at Bunns Lane welding. When you talk to him you realise he weld not for money but because he can.
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Old 11-27-2012, 05:47 PM   #8
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Re: Welding question?

aluminum can be welded just fine, I have a friend who can weld tin foil I think... surround yourself with talented people.
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Old 11-27-2012, 05:50 PM   #9
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Re: Welding question?

Be careful who you surround yourself with, some peoples talents can drive you insane...
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Old 11-27-2012, 05:58 PM   #10
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Re: Welding question?

Terry, did you notice where I gave you props in my cam degree how-to?
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Old 11-27-2012, 11:12 PM   #11
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Re: Welding question?

How much did you get charged DJ.....I had my oem screen brace welded, when I didn't know where to get stuff from and was charged 40!!!
I could've bought a new one at that price!!!
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Old 11-28-2012, 12:07 AM   #12
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Re: Welding question?

Quote:
Originally Posted by dj_smurph View Post
Find an aluminum welding specialist. The side stand bracket snapped off the frame on my aprilia. Got recommended someone by three different people. He done a perfect job. He used a welders battery isolator so he didn't need to remove battery.

If your in north London check out Laurie at Bunns Lane welding. When you talk to him you realise he weld not for money but because he can.
and unplug the ECU! maybe the clock too?
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Old 11-28-2012, 12:47 AM   #13
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Re: Welding question?

30. Was done in an hour and he gave me an aluminium grinding disc so I could fit the side stand back perfect. But that wasn't straight forward welding. He is a genius welder.
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Old 11-28-2012, 12:51 AM   #14
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Re: Welding question?

good advice for tig welding
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Old 11-28-2012, 12:52 AM   #15
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Re: Welding question?

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and unplug the ECU! maybe the clock too?

Didn't have to the isolator done its job. I have watched him do the same on cars and vans. This guy has forgotten more stuff about welding then most have ever learned.

He still welds because he can. He probably earns 10000 a month in rent from the units he owns. The guy is a legend in north London. When you ask around and three different people say him. One works as a mechanic,one is a bike riding instructor and the other is a guy building a single swing armed fire blade street fighter.
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Old 11-28-2012, 12:54 AM   #16
dj_smurph
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Re: Welding question?

Oh this guy can mig aluminum like its steel
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