Have been trying to identify an engine knock in my Road* XV1700. Only knocks after it is well warmed up. Nothing at all when cool. Only seems to be at low RPMs. Can goose the throttle very lightly at low RPM and get the noise, or on take off it is very distinct in first, and does in the rest of the gears at low RPM as well, just not as distinguished unless really warm. Knock is very distinct, it sounds like a rod knock in a car and seems to correlate with the engine RPMs. I just bought this bike about a week ago, but I'm pretty sure the noise isn't normal. The bike has just over 14K miles on it. I've read several posts describing the same thing, but no one has the common courtesy to post the fix once they get it. They just disappear once they get their answer. Most the forums I did find it in seemed to be abandoned and can't contact the member who posted the issue to find out what the answer ended up being.