Balance FactorUp to Singles
Balance FactorPosted by goran_svensson at February 20. 2010
Does anyone knows what the balance factor of singles was when the
engines left the factory?
I have a 1956 Mod. 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
Re: Balance FactorPosted by ian_allen at February 24. 2010
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.