justin_o_guy2 wrote on 05/27/14 at 12:36:45:Sebun FIFTY!? YOu gonna a need a bigger cam & carb..
& I have NO idea how the swingy balancer thing could be "adjusted" to make the vibes any better,, Ive wondered if its not a bit heavy, I think Verslagen has experience in that area, & IIRC, it wasnt all good..
It would take a engine balancer to tell you what to do.
From what I can recall in my dynamics text book... There are primary, secondary, tert... terc... er 3rd order vibration (and more) exhibited by the typical 4 stroke internal combustion engines. I believe out counter balancer does a fairly good job of dampening out the primary's. I believe those are vertical or aligned with the cylinder as the case may be. The only way to perfectly balance the vibes out completely is to configure the engine like bmw's opposed horizontal cylinders. But even then they'll still be those 3rd order vibes.
So there's not a dam thing you can do to improve on it w/out driving yourself nuts.
We had 1 guy put in a wiseco piston and believing that it was precisely balanced, added weight so the new piston weighed exactly the same as the stock. The added weight broke loose and caused it to fail. I don't think anyone's complained about more vibes with the new pistons not being balanced besides.
ps, I think jog is referring to a failed CB bearing I had.
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