Motorcycles

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Harley-Davidson Aermacchi short track frame

Harley-Davidson Aermacchi motorcycles are very potent flat track racers you could buy from the Harley-Davidson dealers.  They were called CRS (250cc) and ERS (350cc), and had


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Harley-Davidson Aermacchi frame tube sizes

During the process of reverse engineering Aermacchi CRTT, SS, H, early CRS, late CRS and ERS, we kept track of the common tubing sizes used


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Aermacchi CRTT and Paul Brodie modifications

Paul Brodie (http://flashbackfab.com/) designed and made his own CRTT frame a few years ago, and he was kind enough to share his drawings with me.


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MV Augusta artist Albert Bold

We had a great time with Albert Bold, and in my view “The King of MV Agusta”. What a great shop he has in Phoenixville,


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WWII wooden motorcycle workbench

Who wants to work on a motorcycle while on their knees?  Nobody.  Make a workbench! While I was surfing Harley-Davison WL 45 sites, I saw


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Garden Gate Manx – The book about my bike, by Niels Schoen

Review by Patrick Downing, 1-June-2018 Amazing.  Incredible.  Awesome.  Unbelievable.  Work-of-art. Incredible journey. Rarely have I been so impressed with a book on engineering.  Niels Schoen


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Reverse engineering an Aermacchi CRTT tank

The tank of a Harley-Davidson Aermacchi CRTT is an iconic masterpiece of design. The classic shape of the long rectangular tank with gracefully radiused edges


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Reverse engineering an Aermacchi CRTT frame

Why reverse engineering an Aermacchi CRTT frame?  Well, I had a dream to go to Bonneville and race a CRTT based bike and try to



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H-D Aermacchi 39984-69P, REAR CHAIN ADJUSTER ASSEMBLY Adjuster Body

Perhaps you missed the article on the ‘Threaded Shaft’ for the Harley-Davidson Aermacchi part number/description of ‘39984-69P, REAR CHAIN ADJUSTER ASSEMBLY’?   We are going to


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