Maybe this will help a little,
you only preload these past the first ramp for tension. the thee holes are for fine tuning, one in the middle would be the "all around setting" the hole that will make the spring tension tighter when you assemble will make it engage at higher rpm, and the hole that makes it the loosest when assembling will make it engage sooner.
If the above scan does not come out legible enough just pm me your email and I will forward it, its an actual full size scan but photobucket does not let them blow up to full. Its from a mini bike service manual (like a chiltons for mini bikes, so info is vague and usually confusing :laugh