I have the same issue only riding it 1x, klr640s. Took back to dealer and don't think they wanted to test it in Rain. Service guy said he just had another customer claim same issue with another "s" sold, plus he has seen other info on the internet also stating the issue particular to the "s" model. He stated he was going to contact Kawasaki and figure it out. Hopefully I'm not stuck with a new bike that can't steer appropriately. I'll be back with update.