Does the machine shop have to have all the internals at one time to balance them, or can I just take them my crank, rods, pistons at one time and then take them the flywheel and pressure plate later?

 

I believe it's best if they have all components. When I had mine done though I just gave them crank, pistons, rods.

 

Most honda cranks are well balanced even after usage, mine was only about few grams off after 60K miles.

But usually they will want to have everything that is conencted to the crank, such as clutch, pressure plate, crank pulley, oil pump sprocket and your internals..

stan