[Black05rr]

Go to the factory pro website and click on "Shift Stars" in the left column of the page. There is a nice clear picture of a shift star, detent arm & spring on that page.

http://www.factorypro.com/

It's kinda hard to tell but from that pic also but one end of the spring wraps around the detent arm and keeps tension on the arm to the star. If it's bent or broken, you should be able to tell pretty easily once you get in there.

Also check the gearshift spindle & return spring, (most likely the culprit), I don't have a pic of that for you but the spring looks similar to the other.

 

[Black05rr]

Maybe this will help.

http://www.ronayers.com/fiche/200_0426/gearshift_drum/gearshift_drum.cfm?man=ho&groupid=5250&parent=5240

 

[Black05rr]

Yeah, the spindle goes through the center loop of the spring, and the spring hooks onto the plate on the end.

 

[Black05rr]

Shifter pivot bolt, or ball joints rusted, dirty, or need grease? Shiftrod rubbing on any hoses, etc.?

I'm running out of ideas.

 

[Black05rr]

Yep, that's the spring. I've been referencing the service manual trying to give you a hand, and in the troubleshooting section all it says about the shift pedal not returning is:

1. Weak or broken gearshift spindle return spring.
2. Bent gearshift spindle.