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Old Streetfighter Motorcycle Forum Post 10-25-2019, 01:04 PM   #31
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Default Re: Sunday at church: Mass of the Dirtbag 2019

I found my way here from the FOTM thread. Amazing work - thanks so much for sharing.

I'm curious - if you didn't do the motion studies in CAD to know that it would dive under braking, then what was the geometry based on? It looks too meticulous to think that you would have just eyeballed stuff.

What would Smoker do?
1979 CBX stealthy-mod
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Old Streetfighter Motorcycle Forum Post 10-25-2019, 06:40 PM   #32
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Default Re: Sunday at church: Mass of the Dirtbag 2019

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Originally Posted by Syscrush View Post
I found my way here from the FOTM thread. Amazing work - thanks so much for sharing.

I'm curious - if you didn't do the motion studies in CAD to know that it would dive under braking, then what was the geometry based on? It looks too meticulous to think that you would have just eyeballed stuff.
I don't know what he used, but I used Tony Foale's "Funny Front End" program for my own build. It calculates and graphs anti-dive (also trail and wheel base and rake) vs wheel travel for you, and also can calculate wheel travel vs spring force for a variety of suspension setups (including linkage styles). Well worth the money, and MUCH easier to use than a drawing based CAD program.
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Old Streetfighter Motorcycle Forum Post 11-02-2019, 07:10 PM   #33
make that thing forkless
forks and valves... WTF?
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Default Re: Sunday at church: Mass of the Dirtbag 2019

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Originally Posted by Syscrush View Post
I found my way here from the FOTM thread. Amazing work - thanks so much for sharing.

I'm curious - if you didn't do the motion studies in CAD to know that it would dive under braking, then what was the geometry based on? It looks too meticulous to think that you would have just eyeballed stuff.


Thanks for the props... much appreciated!

In the CAD layout, I control the amount of rake and trail in a static position. If I had more time would have simulated the motion through suspension travel. As Seb mentioned, Tony's software is ideal for these types of studies.... but my version crashed and I haven't been able to re-activate it
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Old Streetfighter Motorcycle Forum Post 11-02-2019, 08:07 PM   #34
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Default Re: Sunday at church: Mass of the Dirtbag 2019

watched the movie with you in
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