Local Rotation Problem

Hi everyone,

I'm relatively new to Max and am currently animating a bmx bicycle. I'm trying
to animate the bars rotating. I've moved the pivot point and rotated it so that
when the bars rotate, the forks spin around without intersecting the frame of
the bike. It all works perfectly in the viewports when I rotate around the local
y axis. However, when I set key frames and animate the rotation it rotates back
and forth around another axis aswell. I had a similar problem when rotating the
frame around the forks but I managed to overcome it by playing around with order
of the axes in the euler controller but that doesn't seem to be resolving the
issue this time. What is happening to my animation and how can I avoid/resolve
this issue?

Any help would be much appreciated.

Thanks