Mike, the variator weights do make some noise at various revs. They make a mild rattle/knocking on a medium to heavy throttle under acceleration. But normally no noise in the cruise on a neutral throttle setting, or when slowing down. That may be what you are hearing. You could describe the noise they make as like marbles in a box rattling around. Is your oil level ok? If you are not sure about the noise, then do go back to your dealer who can have a listen.
I think you are both right. However, Quantum Mechanic, it does it all the time at higher speeds. Don't really hear it much around 60 mph or less unless I open the throttle a little or it goes under a load on hill. The faster I go, the more steady it is, but of course, the faster you go, the more it's under a load. It is never just "cruising" because it takes horsepower to overcome the wind friction, so just like opening the throttle at 60 and hearing it, when you are cruising 70 the throttle is open more and it's getting closer to "wide open." Hope I made that clear? (oil level is fine, yeah box of marbles). I think a lot of riders are deaf or just not tuned-in to the mechanics of a vehicle, so they don't hear it, or ignore it, then tell you it's not normal and you should take it back to the dealer. I'm guessing they all do it and some of us hear it.I had this noise since brand new, it's normal. Just like you said about the throttle settings.
Thanks. : )
Nice suggestion, but nope, they are tight! Just a normal rattle it seems from what the other guys are saying.If this hadn't happened to me personally, there is no way I'd suggest it: Check to see if the bolts holding your license plate are tight. I had what sounded like an engine rattle for a couple of weeks, and could never locate it. While washing the bike one day, I noticed the license plate was loose. I tightened the bolts and went about my business. The next time I rode - no more "engine" rattle.
Great... we are all waiting with bated breath to see if there is a cause/relationship to this sound that some of us are hearing and most say it's normal. Would be great to find a simple fix for it and get rid of that irritating sound.I have the k7 400. Last week I sanded down the clutch shoes and was successful in eliminating the slippage and groaning. When I tested it at highway speeds I found that there was an acceleration knocking noise that I never had before. Though it may be 'normal' it is probably something that can be fixed. My money is on the cvt. I am not a mechanic. I just go by what I learn here on the forums. My theory is that since the dynamics of the clutch has changed it causes the cvt to change it's dynamic operation also. They are connected. Maybe just enough to get one of those roller balls to start knocking around in a dusty track. This week I need to clean out the cvt and degrees the movable and fixed faces. I'll let you know if that works.