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

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  #31  
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Hmm. interesting bit about exhaust back pressure. I have Standard, unmodified mufflers. I can see how this would worsen a spitback. Bike doesn't do it now so I won't be testing this.
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  #32  
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is the epoxy in your ports able to withstand ironhead combustion temps? brazing rod was more commonly used.
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  #33  
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It's not the temperature that worries me but the resistance to modern alcohol fuels. This is they highest rated stuff I could get a hold of and I used it as a temporary repair on the inside of a Ducati fuel tank and it worked OK. Plastic padding epoxy metal.
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