Some weave, some don't. A guy claimed he tracked the problem to the wishbone front suspension's bushing. Another claimed it was a design compromise (forgot the specifics). BMW refused to acknowledge it. The forum may have flushed much of it because it was getting to be pretty heated.Looking thru the threads on the K1600 forum I finally found a discussion about the ‘weave’ and a ‘floating’ feeling in the front end. Most it seems we’re relying on the temp controlled TPMS system and running upwards of 41-2-3 psi in the tires. They said the manual recommends 42 as a cold setting psi. Most also said that they/we should just get used to it, that it’s not dangerous. I realize it’s got a very trick suspension front and rear and it weighs in around the mid 700 pound range but…I also see that the earlier models had 160 ponies but the later models got their power reduced. Funny, around the same time I read about the handling issue I answered an ad for a low mileage 2014 GT fairly close by but so far no response.
It was subtle. But take your hands or eyes off the front end, and you could get a surprise. I rode the bike to Skyline Drive and the VA Dragon, and I never felt comfortable because the bike demanded so much attention. I think the 2012 model was the best one. It had a normal throttle, but many complained it was too aggressive, and BMW tamed it to the point of making the bike a handful in critical throttle control maneuvers.