Damn hard to tell. If everything is chromed and cleaned religously, there will be a black dust line forming in the crack of the joint if it's moving. Short of that you need a way of latching onto the sprochet for leverage and trying to get slight back and forth rotation indipendant of the wheel itself. If you can, it's lost bolt torque. Sadly as I mentioned in the earlier thread, slapping a wrench on the bolt will prove nothing other than the loctite is working. I suspect many of these kind of failures are due to improper assembly techniques. Poor mating surfaces, wrong bolts, chrome bolts, or chrome on chrome mating surfaces that are slippery causing too much load on the bolts themselves. Done right, it should be a non issue.
Ron

 

I had the same thing happen....just drill and use a easy out and then put in new bolts.......no big deal.....

 

Same thing happend to my buddys low rider 2 weeks ago. Called me up to go rescue him sout of us on sunday. All the bolts had loosened up and one was broke? He had put a new chrome wheel on 2 months back and torqued and used locktite. The only this is he reused the aftermarket bolts that he got on Ebay. The bolts had no shank (all threads). We tighten them to get him home. He ended up replacing them with the same type of bolt? I perfer the harley ones even though they are too $ because the shank is just the right lenghth. Stronger Bolt. Also my brother in-law has a buddy that had all the bolts back out and lock up the wheel. I think there are some strong gremlins out there messing with scoots.

 

You have the cush-drive on your '09...should not see any external bolts if I am thinking clearly...but some '09 owners should be able to answer more accurately.