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Model 18 rigid frame

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Hi I am new to Norton and have just acquired a 1949 model 18 rigid fitted with a 1958 ES2 motor. At some time this engine was removed and various modifications made to the frame to accommodate a different engine. I would like to return the frame to standard spec. I have been unable to find a drawing of the rigid frame online and wondered if someone on this site could kindly point me in the right direction. Failing that is there a member willing to take pictures/ dimension of their frame? Many thanks

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See attached........Rigid frame drawing but no idea which year or model. A similar drawing can be found on the Andover Norton Spares Site. Sign into the spares page and click on Browse by Model. Then go for Singles and pre-Featherbed. Scroll down to the drawing which is useful because it numbers and names the parts. Some are available from A/N themselves but not many.

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Thankyou for that, I am hoping to find a drawing like that but with dimensions added. In the first instance I need to know the diameter of the seat tube which runs between the gearbox and engine

if anyone could please confirm that, thanks

I have a 1950 ES 2 w/ plunger chassis - I am assuming ( but not certain ) that the seat tube would be the same - I can measure it if you like . Let me know  -

Richard 

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Yes please Richard. My original tube has been cut out and replaced with a stub of 1" diameter but it looks to me that the original was slightly larger, maybe 1 1/16"? Also if possible could you please measure the distance apart of the two lugs which locate the engine/gearbox plates? Many thanks for your help,

Andy

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Hi Andy -

 Difficult to get really accurate measurements - not much room to get calipers in squarely but it looks like 1 1/4” diameter for seat tube.

Even more difficult for distance between lugs - I assume you mean distance between lug on front downtube and lug on seat tube - if this is what you mean the measurement appears to be 14 9/16” between centers. Hope this helps.

Richard

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Yes looking at it again I am sure that you are both right at 1 1/4". On my frame the tube has been removed and heavily painted over. The hole that was left that I measured at approx. 1 1/16" was in fact the inside diameter of the 1 1/4" original tube that had been left in the lug, the paint having covered up any witness. Thanks to you both

 


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