Vibration between 70 and 80 MPH?

[snics]

I was getting a vibration above 70 mph and adjusting the belt fixed that... BUT I have another vibration that is worse, and is RPM related.... does it in 4th , 5th and 6th gears between 3450 and 3900 RPM... I would not think this is belt related because it happens at 3 different belt speeds....
The bike feels and sounds like it is running over rumble strips at those RPM....

I have the exact same thing. Was told it was harmonic but feels like the Spyker is vibrating apart. Have to get out of that rpm range.
Going into the shop and asking to look into it again.

Did you ever get it fixed.

[Bobfour]

Anyone else feeling a vibe around 70 to 80? Sometimes its lower 70s, sometime upper 70s to 80. It goes away with a little more speed. Feels different from the vibration I had on the 2011. Feels more like its coming from the engine. I will try to see what RPM it is when its doing it. Hopefully I can ride it this afternoon and tomorrow. Just seeing if anyone else is noticing it.

I had the same vibration, put on a smooth spider and the vibration is gone on my 2016 F3T.

[Msmoto]

My new (two days ago) 2016 F3 Limited SS has this about 70 - 75 mph, seems more when backed off. Nice to know that it is apparently a normal phenomenon, but will check out an anti vibration device as it is annoying.

[Bob Denman]

BRP is coming out with a belt tensioner for the f3s...

[snics]

BRP is coming out with a belt tensioner for the f3s...

But we need one for the RT also.

[Bob Denman]

Amen...

[Msmoto]

Discussed this issue with some folks who race those big cars, begins with N..... who must remain anonymous, but their thinking was this is clearly a design defect and should at some point be warrantable. The vibration is so severe, I cannot ride between 68 and 76 mph, thus on the Interstates, as this is about the traffic flow, it creates a safety related issue.

My suspicion is that when dealt with effectively, BRP will come up with a solution and it will not be something which will cost the owners.

[Bob Denman]

Have your belt tension checked: I'll bet that it's looser than the specifications call for...