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Engine identity

Submitted by andrew_windsor on Sun, 08/11/2015
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Heavy Twins

Hi All,

Not too sure what engine i have in a cafe racer i recently purchased.

The log book states 20/119583/1

745cc

I got the magnifying glass out and the 0 looks like a C maybe not hit hard enough at the factory. On the cylinder barrel what i can make out the numbers are 063850 if thats any more help.

Kind Regards

Andrew

Submitted by Xanna_jeannett… on Sun, 08/11/2015

Permalink

Previously andrew_windsor wrote:

Hi All,

Not too sure what engine i have in a cafe racer i recently purchased.

The log book states 20/119583/1

745cc

I got the magnifying glass out and the 0 looks like a C maybe not hit hard enough at the factory. On the cylinder barrel what i can make out the numbers are 063850 if thats any more help.

Kind Regards

Andrew

Hello well your machine was built between 1966 to 1967 a 750cc atlas model ,yours anna j

Submitted by andrew_windsor on Sun, 08/11/2015

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Hi ,

Thank you Anna you have answered all my questions, i had it in my head as an early Commando little did i know.

Kind Regards

Andrew

Submitted by phil_hannam on Sun, 08/11/2015

Permalink

Previously andrew_windsor

On the cylinder barrel what i can make out the numbers are 063850 if thats any more help

063850 is the casting and part number for the 850 barrel.

24237was the casting number for the750 Commando barrel.

However...........some 850 barrels were machined to 750 piston size. The 063850 barrel has no side flange at the bottom.

Check out the attached photos.

Attachments 750-cylinder-barrel-24237-jpg 850%20Barrel%20063850.jpg

 


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