I've done a lot with this project cut down on the vibration characteristics of the little engine!
BUT!! It's displacement has increased to 2.9 liters which is a negative, as it the slight increase in stroke. I'm hoping the the longer rods and the much lighter piston/pin will offset those negatives. Attention to balance and the better balancer should offer marginal improvements as well. Replacing the solid hub that came with the original engine was a noticeable improvement, so I'm thinking this will improve the situation.
