All 650's Vibration?

[Pompeybiker]

Hi,
Does anyone else notice high frequency vibration on their bikes?
I found it to be quite intrusive when accelerating hard which is strange as when I had a test ride on another bike a few days before I didn't notice it.
The test bike was fitted with a Yoshimura full system so may be that helped with the vibes?

 

[Brammers]

Any specific rev range?

J

 

[Pompeybiker]

Not sure but I was doing around 90 in top gear

 

[GPJake]

Many reviews mention this issue, but I don't notice it.

You could always try some heavier bar ends.

 

[Duncan]

90mile (145km) is about 6 - 6500rpm? questimate.
there are some strong vibrations at about the 6000 range, but tom jones would find this is not unusual.

It's a standout on this bike, i think, die to it being quite smooth in the lower range (except for what ever causes the dash vibration at about 3000rpm)

Many get used to it, the bike does soften as it runs in and most people get a more rubbery set of hand grips. like progrip or such, so that the bars have a little bit more insulation.

 

[Brammers]

My 6000rpm vibes settled after the 8k service.

Also work checking that you don't have any misaligned lower fairing panels rubbing on the frame etc.

J

 

[miweber929]

How many miles do you have on the bike? Once they get around 2,000 or so these bikes smooth out very nicely.

Just curious: how many bikes have you owned before that were inline 4's? From your sig it looks like you have a lot of twin experience, 4's are a higher frequency vibration.

As stated, heavier bar ends help as well.

 

[Pompeybiker]

The bike had done 5,000 miles so well run in now.
the vibes were coming through the seat rather than the handlebars.
I have to admit that I haven't owned an inline four for several years now having owned triumph triples more recently.
my last four was a CBR600 but that was ages ago...can't seem to remember any obvious vibes though?
Also the demo bike I rode didn't vibrate so much but it did have a VERY nice Yoshi full system fitted to it!

 

[GPJake]

The bike had done 5,000 miles so well run in now.
the vibes were coming through the seat rather than the handlebars.
I have to admit that I haven't owned an inline four for several years now having owned triumph triples more recently.
my last four was a CBR600 but that was ages ago...can't seem to remember any obvious vibes though?
Also the demo bike I rode didn't vibrate so much but it did have a VERY nice Yoshi full system fitted to it!

Interesting, the seat? I haven't heard much about vibes in the seat at all...

There are always aftermarket seats, but, all depends on how badly it bothers you I suppose.

 

[Brammers]

Check there aren't any fairing panels knocking against each other.

J

 

[Jonah]

My bike has now done 3500 miles, on a day trip to Belgium Wednesday I noted it still vibrates badly above 80mph-both bars and frame.Above 90 mph the mirrors are a pointless exercise!
I hope it gets better!

 

[miweber929]

The bike had done 5,000 miles so well run in now.
the vibes were coming through the seat rather than the handlebars.
I have to admit that I haven't owned an inline four for several years now having owned triumph triples more recently.
my last four was a CBR600 but that was ages ago...can't seem to remember any obvious vibes though?
Also the demo bike I rode didn't vibrate so much but it did have a VERY nice Yoshi full system fitted to it!

The thing with vibrations is they are a harmonic "imbalance" with things being in motion (like your spinning motor) and things like weight, density, length, whatever, can change when and where that "imbalance" is. I quote imbalance because it's actually a balance of things moving together that usually cancel each other out, when they don't you have a vibration.

So in and of itself, the Yosh may not be contributing to the vibes being less, the mounting, let's say, may change what vibrates, where and how much. Usually it's the ends of things: the handlebars, windscreen, tail section, etc. that you hear or feel the most vibration.

If it's coming from the seat area, I'd look at a few things: grab your trusty torque wrench and service manual and start going through the bolts you can see torquing them to spec. Then as mentioned, look for loose or incorrectly fastened bodywork; the panels under the seat that "attach" to the tank with Velcro like to come loose from the factory. A $5 kit of industrial Velcro purchased at a hardware store will fix it right up.

I'd also look at any mods you've done, anything you've added under the seat (like a U-lock) that can be vibrating. If all else fails buy a cushion of some sort, my wife has a gel pad she puts on the rear seat to make it more livable for her, and see if that isolates you.

It might just be a thing with this bike that changes once you, say, change the tires. Some people are also just more aware of certain vibrations as well so it may take some getting used to.

 

[aaronlukemarshall]

I really don't notice vibrations.

Usual things like hold on less tight and trust your bike more, heavier bar ends, seating position, Softer grips, Softer seat, check all runner mountings. Adjust suspension settings.

Don't sit on the bikes power band constantly change it up or down a gear.

I have found now the bike had its first major service at 8500 it's probably bed in that's its buttery smooth across the rev ranges.

 

[Pompeybiker]

Thanks for your imput guys just had a nice ride to Loomies and didn't notice any discernable vibes at all!!
Maybe it's because I've removed the hard luggage and mounting frame from the bike now?

 

[GPJake]

Thanks for your imput guys just had a nice ride to Loomies and didn't notice any discernable vibes at all!!
Maybe it's because I've removed the hard luggage and mounting frame from the bike now?

Depending on the mounting (tightness / etc), that could certainly cause a noticeable vibration.

 

[Duncan]

While making that last post, my hands were tingling like they used to on my old FZ750. hunting buzzing fairing panels and managing vibration is one thing, eliminating secondary balance issues in an inline 4 is something else.

For vibrations in the seat, i'd be looking at the chain or rear tyre.
a still link is per revolution where as an over tight chain is most of the time.

 

[Conundrum]

Mine vibrates between about 6200-6400rpm, and moreso when cold vs warm. Seems like every inline 4 will do it, and really just depends on the engine/harmonics where it occurs in the rev range. When I test rode a brand new CBR600RRA it was twice as bad, but only really felt it above 12,000rpm.

 

[Road Hog]

Hi all,I have about 15000km. on my bike and get vibs.in the pegs after 6000rpms it doesn"t worry
me too much because its a four.However, I will be changing my exhaust some tine next week.And
I will let you know if there any change in the vibs.I am putting on a carbon termignoni h131090cv.

 

[Jerry]

I definitely noticed the vibrations in the handlebar on my bike from time to time, like a slight tingly sensation. I only have done about 1200km (750 miles) on it but recently I haven't been noticing the vibrations as much. I mostly think that's a matter of me getting used to it though. I also find that if I feel the vibrations, I try shifting up (or down) to get in a slightly different rev range and the vibrations are gone again.
Having said that, the vibrations have never been truly annoying or worrying to me. I saw someone mention that vibrations get so bad the mirrors become unusable, that does sound like a problem to me though.

 

[Hondahonda]

Foam anti-vibration grip covers helped a little bit for me. But yeah - it's the most vibrating bike I've ever had