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620 4-link, or 'How to make your life difficult'

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#21 Str8jacket



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Posted 20 January 2018 - 01:28 PM

I've had no more issues, and it's been daily driven, abused.

Thats good to know. I am from the over engineering camp and end up making most thiings too heavy, it looks like you have hit the balance between light and strong enough to do the job. I spend to much time working on 500 ton machines! Every thing is made out of inch thick plate.

#22 G-Duax


    prickly in San Antonio

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Posted 20 January 2018 - 02:53 PM

And even the big stuff gets torn up now and then.


Many years ago when Triumph went after the AMA crown, they made every to break in the engine, then went slightly stronger on parts until they had no breakage, and Gene Romero took the crown for them.

(but that was back before CAD, and computer analysis of how things like rocker arms, and rods flexed)