I understand but if I smoke a flywheel and clutch and replace them, I've never rebalanced the assembly, but that has been on external balance motors, what gives?
Yup. That's a bad thing. I've had to put the old flywheel and pressure plate up on the balancer, mark everything so I had a reference and then checked to see where any out of balance was and then duplicated it on the new stuff.
That's as close as I know how to do it, without taking everything apart. So, it can be done.
Like I was saying, even if you get the flywheel end of the crank, say under 5 grams for a street deal and zero balance the FW/PP seperatly, it will change the crank when you bolt it on. Sometimes a little. I've seen as high as a 20 gram change.
Every builder I know gets the crank close and then puts the FW/PP on and finish it up.
