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Buzz

Hberninger

Hberninger

New member
At certain higher speeds, I get a "buzz" as I accelerate or decelerate. I was thinking it might be the belt fluttering. Anyone have any thoughts about this?
Thanks, Bernie
 
Is it actually speed, or rpm related? :dontknow:
Which "certain speeds" are we talking about?
It certainly could be the belt; some more information might help some of the folks here who have dealt with belt vibes be able to answer your question.
 
Does it come and go as you pass through a particular RPM? If so... yes, belt harmonics. Check that you have the correct belt tension and alignment.
 
At first I thought it was at 5100 RPM in 3rd gear, but then I noticed it at around 75 mph, but I don't know the rpm's. I'll need to get more data.

Im not sure I'm mechanically adept enough to check the belt tension and alignment. Looks like a trip to the dealer is in order.

By the way... On another note... The manual says oil change at 3000 miles. I read on another web site that BRP changed that to 4600 miles. Any truth to that?

thanks for all the help.
 
Hberninger said:
At first I thought it was at 5100 RPM in 3rd gear, but then I noticed it at around 75 mph, but I don't know the rpm's. I'll need to get more data.

Im not sure I'm mechanically adept enough to check the belt tension and alignment. Looks like a trip to the dealer is in order.

By the way... On another note... The manual says oil change at 3000 miles. I read on another web site that BRP changed that to 4600 miles. Any truth to that?

thanks for all the help.
Click to expand...
Get the same thing on my wife's new RT. I'm thinking belt with the torque from the motor. Thinking about getting the belt tension from the guy here. I think that will fix my problem. I know it's not the tension. Checked it and bike only has 675 miles on it. I was riding it today and noticed at 75 mph it would do it. Not all the time but when it needed to give it a little throttle like a small hill. But somewhere around 5200 rpm's seems to be the range.
David
 
Before jumping on the belt as being the issue (though its a good chance it is) check all of the body panel screws for tightness and then take a soft hammer and lightly tap around the bike. My 09 RS had a persistent buzz at certain speeds that drove me nuts. It turned out to be a bottom splash guard that vibrated enough to be felt in the foot pegs. I fixed it and the buzz went away.
 
If it is the belt it won't be RPM specific. It will do it in a certain gear at a certain speed. It may vibrate in more than one gear but very unlikely at the same RPM.

If it is a loose something or other then it will buzz at a specific RPM in every gear.
 
Hberninger said:
At first I thought it was at 5100 RPM in 3rd gear, but then I noticed it at around 75 mph, but I don't know the rpm's. I'll need to get more data.

Im not sure I'm mechanically adept enough to check the belt tension and alignment. Looks like a trip to the dealer is in order.

By the way... On another note... The manual says oil change at 3000 miles. I read on another web site that BRP changed that to 4600 miles. Any truth to that?

thanks for all the help.
Click to expand...

BRP sent out a card seveal months ago to take to your scoot to your dealer and get a panel changed out to make oil filter(s) more accessible. They also repalce the filter(s) and increased the oil change to 4,600 miles. You should have received the card or if a new unit, it may already have the new panel. Check with your dealer with your VIN number...a phone call to the service folks should save you a trip.

:spyder2:
 
Last edited:
Hmmm...I've read (I think maybe on this forum in earlier days) and also in other forums and magazines that belt driven cycles tend to have a band of speed that creates a harmonic vibration. Same models can have different bands at different speeds but almost all have it somewhere. I know I get this consistently on the Spyder at 62-66 (whether I'm accelerating up or coming down from a higher speed - regardless I get a "bbbrrrrrrr" sound (like trilling your tongue) as well as a bit of vibration. I also have the same situation on my BMW F800ST only its band of sound/vibration is 69-72. After I was told this was normal I just regard it as a "speed alert" and don't mind it.

I'm hoping Scotty will weigh in on this because I believe he had written about this phenomenon; of course, that's even assuming that's what you're dealing with. You could have a different issue.
 
Hberninger said:
By the way... On another note... The manual says oil change at 3000 miles. I read on another web site that BRP changed that to 4600 miles. Any truth to that?

thanks for all the help.
Click to expand...

The oil change mileage is only if you have the newer oil filter installed.
BTW ......Hi Jane......Glad to see you back.....:clap:
 
buzz / flutter

my 2012 RT gets a fluttering from the belt at 70-75mph (comes n goes), NOT no more since installing the smoothspyder belt tensioner.:yes:
 
I get the same....Highway speeds and very light throttle. Give it a bit more throttle and it goes away....Normal.
 
GeminiJane said:
Hmmm...I've read (I think maybe on this forum in earlier days) and also in other forums and magazines that belt driven cycles tend to have a band of speed that creates a harmonic vibration. Same models can have different bands at different speeds but almost all have it somewhere. I know I get this consistently on the Spyder at 62-66 (whether I'm accelerating up or coming down from a higher speed - regardless I get a "bbbrrrrrrr" sound (like trilling your tongue) as well as a bit of vibration. I also have the same situation on my BMW F800ST only its band of sound/vibration is 69-72. After I was told this was normal I just regard it as a "speed alert" and don't mind it.

I'm hoping Scotty will weigh in on this because I believe he had written about this phenomenon; of course, that's even assuming that's what you're dealing with. You could have a different issue.
Click to expand...
I don't think I could have described it any better than you did. There are lots of possible causes for sounds, vibrations, or sounds induced by vibrations. Virtually all motorcycles seem to have them...although some makes/models are worse than others, and some individual bikes are worse than others...or at least different. The belt is a common source. There is a reason that BRP uses a sonic gauge to test the tension. That should tell us something. Sound is vibration. Also possible are body parts, loose components, or the engine itself. You are probably familiar with the roughness and vibration that result from having the cylinders tuned a little differently from each other on some bikes...especially twins.

My advice to those that have a noise or vibration is to ride the dealers's demo to compare. If yours is worse, and objectionable, have the tech ride them both and compare, then try to figure out why. It can be a challenge, and in the end may not be able to be changed readily anyway. For instance, the throttle bodies cannot be calibrated by the tech on a Spyder, in order to balance the cylinders. They are factory set and sealed.
 
Laila's Dad said:
My spyder does this too, I normally let off the throttle down a few mph and then speed back up and it goes away. :dontknow:
Click to expand...

So does my friends 2011 RS and the dealers personal RT. Everything on both our spyders is within spec....It's just part of the machine...:)
A saying we have in the jetski world: "Ride more, worry less".... :thumbup:
 
I'm sure BRP keep tracks on our threads and take notes and help us to combat all our worries, concerns and do something and keep us Happy SPYDER:spyder2: owners and future owners.
 
I guess that I've just never noticed any buzziness in my bike because I simply don't ride up there at those mphs or rpms... :opps:
 
There are a couple spots in the RPM range where you may feel some V-twin buzzing in the pegs for 200-300 RPM's. The belt vibration is much more noticeable and will usually subside the second you ease up on the gas and reduce the loading on the belt. Try going over a hill and keeping the RPM's in that buzz zone, if it gets worse going up the hill under a load and goes away going down the other side it is probably belt related, if it doesn't make a difference it is more than likely motor related. 5100 RPM's seem to be a rough spot in the motor, that is where a lot of the grinding was taking place in the 2010 RT's from the motor mount pad settling and letting the bolt grind on the frame.
 
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