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Balance Factor

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Does anyone knows what the balance factor of singles was when the

engines left the factory?

I have a1956Mod. 19 with a modified big end and the actual balance factor is 43%

I am going to re-balance the crank but I don?t want to drill too much so I can?t go back to

a original big end when that time comes

Regards

GÃ?ran Svensson

Permalink

Hi.

According to P L Garrat's book Norton Motorcycles (he worked at Norton's) the balance factor for the Mod. 19 is 50%. My ES2 runs at this balance factor and is pretty smooth.

Cheers.

Ian.

 


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