Originally Posted by Quietroit
How do you balance the crank when you modified it.
I've never done it, or heard how to do it, but I assume getting a prop balancer for a model airplane would be a good start, assuming you can get a way to center on the crank. Then, just drill a hole into the counter balance (the big counterweight that is opposite to the rod pin) until it rolls true. I know that's similar to how they balance full-size crankshafts.
Please, someone correct me if I'm horribly wrong.