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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #11  
Old 24th June 2018
needspeed needspeed is offline
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It's very unusual to be able to see the pinion shaft rollers in an assembled crankcase. Do the rods and flywheels look centered in the cylinder holes?

In your other "galled front piston" thread I see RPLS rods. Looks like the lower end has been apart before.
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  #12  
Old 24th June 2018
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I would reinstall covers and wash cases with soapy solution, or mineral spirits.
Then disassemble to the point where necessary to repair.
I would caution you on brake clean before any welding, especially tig, it can make weldor very sick or worse.
I've posted before about this and many said there is no hazzard, but I feel I should post my opinion.
Do a Google search, brake clean and welding...
https://www.thefabricator.com/articl...an-turn-deadly
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  #13  
Old 24th June 2018
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Quote:
Originally Posted by chevelle View Post
...I would caution you on brake clean before any welding, especially tig, it can make weldor very sick or worse.
I've posted before about this and many said there is no hazzard, but I feel I should post my opinion.
right, phosgene gas is deadly stuff. if you must use brake cleaner, at least warn the shop you're taking it to so they can act accordingly before they start welding.
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  #14  
Old 24th June 2018
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That should have been washed off prior to the gas tank being taken off of the bike. There is no way that case would get 10 feet from my welding table. Like the others said, you will pay for that cleaning time. Once you think its clean at home, your welder should be just starting his process of cleaning. A much finer process than the scrubbing, simple green, dish soap, ajax or whatever you will use in your driveway. If he doesn't, find another welder.
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What ever you use don't use Oven cleaner like Easy-Off, or Ajax. That will be very difficult to weld after. Wash the crud with varsol or turpentine then throw the parts in a bucket with dawn dish soap with hot water, let soak and rince with hot water.

The welder will use his favorite cleaner after preping the joints, grinding brushing or sandblasting, before welding.
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