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Frame model 18

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I have a 1947 model 18 which I am returning to the road after a 60 year lay up. There is a slight kink in the top tube just in front of the carb. Should it be there?

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Can you upload a photo? I have a kink free 1936 Model 18 but a picture would be useful..  

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Is similar although it's plunger suspension. I suspect it's to clear the extra height of the OHV engine and allow for the rockerbox / head to be removed.

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Hi Dean all post war cradle frames have a curved top tube ,it may be an idear to get the frame allighnment checked ,i have a 1947 16h and a mod 18 both had sidecars fitted at some time and both had bent frames Regards Roger

 

Thanks for the alignment tip. That is something I have considered as this bike once had a sidecar according to the 59 tax disc. Don’t know what became of it though. Where did you get you frames sorted?

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A bit baffled. Why assume your frame needs 'sorting'? Everyone has said the top tube shape is correct. And it's hard to see how a crash would bend it up like that.

Put wheels on and see if they are parallel or if there is a twist.

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I presume Roger Deadman (above link) has had a twist else where on the frame. Looks to me if the top tube should be like that. 

Thanks Dean Ghest

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My 16h 1947 had a small lateral misalignment (not front), in the frame. I managed to take it to its place, with long force levers and a good fixation anchor (without temperature) (I hope you understand the translation)

Greetings, Gerardo ..

 


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