Just wanted to say THANK YOU!!!!!!!!!!! to everybody on here. Ihad this same problem today and after taking it to a dealer service and being told these parts couldn't be gotten to without pulling the motor and splitting the case which would cost $1500 to $1800 they told me. I only paid $1200 for the bike so I loaded it back up on the trailer and took it home thinkin I could put it on the center stand and have a $1200 rocking horse.
Then I came on here and found this thread and wouldn't you know that spring had gotten weak and slipped out on mine too so I pulled it out and bent it around to make it more springy put it back together and it shifts better now than it did when I got the bike.
I don't know if this mechanic really didn't know what he was doing or if he knew it was an easy fix and just wanted to charge for the expensive fix either way I won't be going back to them even to order the new spring.
Once again THANK YOU ALL VERY MUCH!!!!!! You saved me feeling guilty about buying saddlebags for it last night.