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TOPIC: Re:Forks question
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Forks question 12 Months ago
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When I triked my roadie, I had to rake it and add 2" extensions. T steel ex are wrecking the aluminum threads in the upper tubes. Can you just replace the tubes or must they be a matched set?
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Re:Forks question 12 Months ago
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You can replace the tubes just make sure the internal components are the same side to side.
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dave
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tapeit59 (User)
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Posts: 309
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Re:Forks question 12 Months ago
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The fork tubes are aluminium? I thought they where steel!
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[img siz Check out my Bike at NoPork.
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Spydr (User)
Let's Ride !
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Re:Forks question 12 Months ago
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tapeit59 wrote:
The fork tubes are aluminium? I thought they where steel!
I'm pretty sure they're steel... Cuz aluminum don't Rust!
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Re:Forks question 12 Months ago
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The tubes are steel. The typical +2 slug was made from aluminum. Dissimilar metal corrosion. You need a sacrificial material between the two that eliminates as much oxygen as practical and will oxidize itself and prevent the two base metals from oxidizing. We use milk of magnesia on some aircraft parts as an anti corrosive and anti seize compound. Other solutions would be zinc phosphate, manganese phosphate, zinc chromate putty, or a corrosion inhibiting sealant.
Although I say all this, my SV650 has aluminum caps from the factory with 84K miles on it (2002) and they have not corroded.
It may also very well be the alloy of the material they used to make the slugs.
7075 and 2024 aluminum alloys corrode readily when in contact with moisture and steel.
3000 series and 5000 series alloys have high corrosion resistance, but not very high tensile strength, and are typically used in sheet form rather than forgings or extrusions.
6061 aluminum alloy extrusion is what I use on motorcycles, because it is the best balance of strength and corrosion resistance in a structural alloy that is not a newer hyper alloy (and ridiculously expensive for the things I do) If I am using the full shape, I got for the higher developed properties of the cold worked variety of this alloy, as the post quench cold forming tightens the grain of the metal even more. If I'm turning it down or machining away from plate, the benefits are lost, so it's not a consideration.
Regardless, it should be your slugs that are taking the beating, not the steel tubes.
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Re:Forks question 11 Months, 4 Weeks ago
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ya their steel. Storry I'm getting old
the extensions are steel too
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Last Edit: 2017/03/02 15:19 By jjvw.
Reason: sp
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Re:Forks question 11 Months, 4 Weeks ago
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the extensions probably weren't torqued enough if you have thread damage in the tubes......
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Re:Forks question 11 Months, 4 Weeks ago
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Flashback wrote:
the extensions probably weren't torqued enough if you have thread damage in the tubes......
+1
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Re:Forks question 11 Months, 3 Weeks ago
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steel slugs to steel tubes should never be an issue unless they weren't tightened right in first place.
We sold plenty of slugs back in the day and they work great.
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