The K ones are 2-3mm longer than the 50 I got from ebay for about $10, making them difficult to fit and remove. But hey, they are now a single use item as I have lots of em.
just use care when installing...
when Murph was looking for replacements (same time i was also, and would not settle for "close"), the ones we found thru extensive search were differing in some aspects, length being one major aspect... also, diameter. The length issue creates a problem as the "expanding" fingers, when the rivet is too short, put a lot of pressure on the parts being held, and are not easily removed. The other issue is most often, and even tho they are sold as "metric", you will end up with 1/4" rivets, which are fatter, and also make them difficult to use,(remove). It also stresses the parts more than the correct ones that 'swell' away from the inner surface being retained.
The areas some of these are used in (primarily around the windshield, black plastic insert wraparound) side pocket parts, have a pretty thin fragile part they attach to, it's not robust, and is easily cracked (seen a few already, and it becomes $$ to replace them). The only solution for protection from fractures, is to run a 1/4" drill bit thru the parts being retained,
but then, downstream, OEM's will not work properly from that point... it's a coin flip. I chose not to recommend any of the ones we tested, as I didn't want (or want to tell Murph to tell others to..) to tell folks to drill OEM holes out for use with 'inch' fasteners.
I also never liked the 'pry out the head' types commonly sold, the 'push pin to release' type in my opinion, was a nice design... but they are costly, and un-obtainium other than OEM.
Big Bummer.
I've probably removed the push pin ones (OEM) at least 20 times, with no failures.. so I kind of like them, not so much the 'pry out the pin head' ones..
I'll also note, I didn't just look at "motorcycle parts outlets/sales places" when doing this research, having had to use extensive amounts of odd fasteners in my engineering work, I went thru almost every venue of fastener manufacturer (probably 40 or so companies, that common folk would never find or use) in search of a 'correct' OEM replacement... and found zip to fit ideally.. bummer.