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Old 06-11-2010, 10:36 PM   #76
DRjoe
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This is very impressive stuff.

How much travel have you managed to get out of the suspension?

Also I have done a small amount of alterations to my engine and frame on my dr and I ran into a few brick walls when I went to find out about registration. How are you going to register it?
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Old 06-12-2010, 06:57 AM   #77
Pilbara OP
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swingarm






Quote:
Originally Posted by DRjoe
How much travel have you managed to get out of the suspension? 200mm +
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Old 06-12-2010, 03:03 PM   #78
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Gonna leave the drive shaft exposed?
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Old 06-12-2010, 08:01 PM   #79
JeffinTD
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Thumb

Here's an interesting link about braze welding, if anyone is interested.

http://www.brazing.com/products/braz...0of%20join.htm

It looks like a good way to get a strong joint in 4130, as long as it isn't exposed to high temps that would weaken the filler, and in this application that shouldn't be a problem.

If I were attempting this I'd have to make some test joints and test them in the shop press and/or have them fatigue tested, but that's because I don't have the previous experience that the OP has.

Here, when someone says bronze welding, they are talking about joining pieces where the base metal is bronze.

Normalized 4130 tubing can be torch welded, or tig welded, but preheating may be required. A professional welder who is an expert in these steels would be a must have IMHO. One stray arc could cause a future crack. E70S2 would be a good choice, as opposed to 4130 rod. Heat treated 4130 would likely require heat treating the entire frame after welding.


Anyway, super-cool project. I can't wait to see how it turns out.
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Old 06-12-2010, 08:56 PM   #80
Richard M
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Weld's not the issue!

Anyone that knows pilbra will know that the loose nut behind the handle bars is the issue not the strength of the welds

I'm sure his first ride out will test the weld strength, wont be a matter of if he crashes more the fact asto what speed ???????

Well done K
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Old 06-12-2010, 10:36 PM   #81
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Exposed

Quote:
Originally Posted by marchyman
Gonna leave the drive shaft exposed?
Hello marchyman, not really thought about it, so it probably will remain exposed. Well see what happens...I can't see any problem with it being xposed and possibly better to keep an eye on the cush drive.

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Old 06-13-2010, 12:52 AM   #82
TUCKERS
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I think Pilbara's treatise on design is spot on.
Some day the motorcycle design and even the seating position will be changed, it's a throw back to riding horses after all.
Maybe when some suspension patents run out things will change?

On another note: if I had a pair of wheels like those I'd take them to bed with me!
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Old 06-18-2010, 10:28 PM   #83
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Its on the floor...



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Old 06-19-2010, 09:32 AM   #84
TUCKERS
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Looking at it, and in my humble opinion, I THINK THE FRAME WILL BE STRONG ENOUGH
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Old 06-19-2010, 10:00 AM   #85
slartidbartfast
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Quote:
Originally Posted by TUCKERS
Looking at it, and in my humble opinion, I THINK THE FRAME WILL BE STRONG ENOUGH
I would suspect the rider will be the weak point in this design
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Old 06-21-2010, 07:35 AM   #86
Mago
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Quote:
Originally Posted by Pilbara

Is this the same bike you designed back in 2005?
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Old 07-06-2010, 05:06 AM   #87
cashelvale
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From now on.............

From now on you will be known to me as Bert Munro..........will there be a large bus parked in your front drive ???????
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Old 07-11-2010, 02:42 PM   #88
Pilbara OP
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Hugh...

Quote:
Originally Posted by slartidbartfast
I would suspect the rider will be the weak point in this design
...amazing the power of the internet universe eh, thanks for the negative vibrations, the fibula has turned out to be a weak point and has now slowed progress on the project somewhat.

Still the anniversary model can now get a bit more attention to cosmetic detail. The pressure was on to have it ready for the Australasian Safari in September. Looks like I have as quoted become the weak point in that plan too.

The bike got wheeled around the other day (moving sheds) and the front suspension feels fantastic. Cant wait to try it for real.

Cheers
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Old 07-11-2010, 02:51 PM   #89
slartidbartfast
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Sorry for the bad vibes - I meant, of course, to compliment the apparent strength of the frame Hope you heal fast.
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Old 07-11-2010, 03:50 PM   #90
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Harden the f*^k up and stop crying about broken bones.

Are you going to be able to replicate this frame after you've finished I'm sure Paul Rooney would be very interested in your design.
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