Magnolia,

Jent's right about the o-rings wearing out and that you may have to add a shim. But first take off both blades, and make sure that the screws holding the blade grips to the rotor head are tight. You'll need to allen wrenches to do this. One goes in each of the blade grips to tighten the screws. If they are tight, o-rings first, then a shim if needed. Don't forget to put a drop of oil in there once and awhile.

Dave / Choppersrule