Originally Posted by
kyle3333
I'm in the process of making some 4x55 pistons using the Kyosho blanks. Is this the proper configuration for the holes? I wasn't sure if they all needed to be equal distance from each other.
That's what I did. Just make sure you drill em straight so they don't get covered by e-clip.
Also, either drill by hand with a finger bit holder or a VERY slow proportional throttle drill. The drill I use can go as slow as 10-20 rpm. You will only want one rotation of the bit after it pokes through while holding stationary to trim flashing off before backing the bit back out slowly in reverse. If you let it spin in the hole at all, you've ruined the piston as it will wobble and remove too much material.
Wayne