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

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  #1  
Old 31st December 2012
Freewheeler Freewheeler is offline
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Default Ironhead build - Sissy bar thread

Afternoon,

I hope you all had a good christmas.

I made a start on my sissy bar/fender strut by gettig hold of some bailing wire from a neighbour. I fastened one end into the vice, the other into my drill and put a few turns into it to stiffen things up a bit.

After fiddling and farting around with a 7x5 numberplate template and a nice old vintage rear light that I got from an autojumble I came up with the following as a start -





Next step is to get a heat source, a tube cutter and some bar - I thought 1/4" would be thick enough (or maybe too thick),

What do you think?

Nick
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  #2  
Old 31st December 2012
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rejeanprimeau rejeanprimeau is offline
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I'll use 1/2 inche for a solid sissy, 1/4 will bent with the wind.
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Old 31st December 2012
hogmania hogmania is offline
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at least 1/2 maybe even 5/8 but not a 1/4 would flex and bend way too easy.
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Old 31st December 2012
Freewheeler Freewheeler is offline
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Thanks, I wasn't intending to carry a passenger so that would make them more of a fender strut - I would have thought 1/4" would be enough for that - what do you reckon.

Nick
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Old 31st December 2012
simeli simeli is offline
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1/4" is going to have a lot of flex to it and vibration could kill it pretty quick, a lot would depend on the wall thickness as well, but even a heavy walled 1/4" is going to have a lot of flex in it. I would look more at the 1/2" tubing and even then I would be tempted to insert a solid rod into the center at least from the frame to the fender mount.

With your low seat frame you have a lot of unsupported fender hanging in the air, I would think the more stable you can make it the better.

You could try 1/4" tubing with a solid rod inserted all the way through it and see if the amount of flex is reduced enough to use it.
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Old 31st December 2012
Freewheeler Freewheeler is offline
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Thanks for the advice, ill have a crack at it and let you know how I get on.



Nick
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Old 1st January 2013
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Hi there,

Have been busy this afternoon transferring thought into metal and came up with the following in 3/8 as that was all I had -





I am feeling pleased with my efforts. This was the second go after a steep learning curve and ballsing up the first one. I worked off the bailing wire template and simply marked where a bend was needed with my old dad's pipe cutter. I then used a Rothenberber Propane torch to heat the section until it was cherry red and hey ho. The first one had an extra bend which didn't really look needed, that was the trouble with using bailing wire - too easy to bend!

Ill take some pictures of the whole bike from the side when I get the chance to do so. I also intend to make another shorter version just to see what it will look like.

I hope these pictures are of interest.

Nick
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Old 1st January 2013
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IronHead78 IronHead78 is offline
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Looks like you are well on your way, looking good.
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Old 1st January 2013
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Quote:
Originally Posted by Freewheeler View Post
... I hope these pictures are of interest ...
Stuff you fabricate yourself is always of high interest on this forum.
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Old 1st January 2013
simeli simeli is offline
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I think you did a great job on it. The 3/8" stock looks a lot more substantial then the 1/4" would have, did you use solid stock or tubing?
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