The metal part engages a paul at the bottom of the spring assembly. I'd guess it's not properly aligned. also the spring assemble needs to mate with the shaft. Fairly easy to do but you may need to be able to see it.
Final issue. .The plastic shaft they put in oem likes to break. The brass one they replace it with much better. (The shaft that goes into the ball)
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times