I've searched and searched but can't find any related issues to answer my question. just got my 2015 two weeks ago and the first 1K miles has been great but now at 1400 miles it feels terrible when getting on and off the throttle. Not sure how to explain it other than it feels like a rear diff with a ton of gear lash. The transition from off throttle to acceleration is no longer smooth like it used to be. Makes me nervous getting on and off the throttle near corners. The throttle cables seem to be adjusted properly. Thought they do seem to loosen up later in the ride. Chain has no more that 1.25" slack. The chain was pretty tight, in my opinion, when I bought it new. How tight is too tight? Manual only says NO MORE THAN 1-1.25" slack. Coming off Throttle by wire belt drive bike so chains are new to me.