I have the problem with the weights coming off 'twice' on the rear wheel - both factory installed ones and one I installed as replacement. I did make sure that I cleaned the rim throughly with alcohol prior to installing the replacements, usually it's one or two weights that fall off (I have a total of 3oz on the rear rim - 3 each, .5oz weights on either side of the wheel. The problem in my situation is that at all times that they came off the foam adhesive tape remains on the rim, the weight release from the tape. Currently have them on order (placed order at end of June) on backorder till 7-21.
Instructions included with the replacements that i installed previously that service manager gave me at no cost (.5oz Chrome 'Bar & Shield') say in the instructions to install 3 drops of 'Loctite' #420( which is a cyanoacrylate adhesive) on the weight prior to placement on rim. Inquired with service manager at dealership about the 420, he did not know about that (He and the parts department do not have the 420 and have never purchased it), he commented that he has never used it and said they just clean and stick them, usually they install the .25oz chrome weights, very rarely do they install the 'Bar & Shield .5oz weights'.
Lost 2 rear weights(on the same side-one I installed and one factory) this past weekend, stopped at the dealership to pick up some items that I ordered and check on the status of the wheel weights, still on backorder till the 21st. spoke with service manager again explained the situation and he gave me a strip of the chrome .25oz weights to hold me over till .5oz weights come in. will install the .25oz weights on temporally (normal clean and stick way of installation) but when the new .5oz weights come I will be removing the existing tape from the weights, installing new 3M tape with the Loctite #420, installed on both side of the tape(tape to rim/ tape to weight) replacing all wheel weights, hopfully that will eliminate the problem, never had this problem on previous bikes.
Larry