I can find nobody who does any dynamic balancing on anything but Harley.
So I thought I would do this myself. I looked for a static balance stand because I dont own one, S@S makes one for $1300.00 U.S.
I think what I am going to do is weight up what I have stock and figure it at 56%. Then weigh up the new stuff and see (if the math can be done) where my balance factor will be and go from there.
Lee
I am NOT going to tell you what to do,, But it should not be that difficult to find a skilled tech who does Dynamic balancing.. I use a guy here in Oregon, and If you like, he WILL accept mailed projects/shipping. I use a converted plastic milk crate for mine. He does Airplane propellors and certain types of industrial equip as his bread and butter but he does do motorcycle engines. Yes,, A number of Harley engine builders use him, and he can make an old pan or knuckle so smooth its like a BMW,, But I have referred a number of people as well as use him myself for British bike engines.
Great job and service. The thing is, there is an epic difference between Dynamic balancing and static balance. I liken it to those old bubble balancers for tires you used to see at roadside gas stations vs the spin balancing with digital readouts at modern tire stores. 2 completely different animals.
But you cannot address Rocking couple with static balance. And, depnding on many factors, most British twins have horrible issues with Rocking couple.
I also never fixate on speculative balance percentages. I Blue print all my parts, (Pin, piston, clips,, all checked for even weights,, machined and blue printed rods and crank.. and then we discuss what type of frame, how its mounted, and typical RPMS and types of riding. I let him setup using that info and whatever he feels best. Always comes out great. He keeps a notebook and can include his specs so if you had to replace the pistons or something,, You just make sure you come back to the same weights..