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I don't know the why, just trying to help the OP. HD changed the flimsy washer for the thicker washer. There is no tab on the updated washer. I can only assume they increased the torque to compensate for the lack of a positive lock. Never had issues with the new washer, throw a little blue loctite on there if you're worried about it.
Apologize for name calling. After visiting dealer while back and he did not have a clue to the change we been talking about..just seemed sort of 'who knows'. However after doing a little searching on here, seems as usual with Harley, depending on bike there is a lot of different solutions. Also say if owner is having problems, then for dealer to do this.. The following path can give someone the correct choice since there is about 6 or so depending on bike.
I have never had a problem with fall away getting loose. Mine was just set too tight. However now that it is at 1", I will monitor it. Our roads around here are extremely good test tracks.
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.