More Vibration WITH Risers??

[daveinva]

Okay, this is dang peculiar.

So, folks here know I recently installed ESI's Easy Risers. After a month-long saga getting everything right, I finally got a chance to spend some serious quality time with my Spyder this evening getting to know how it rides with the risers.

Contrary to all expectations, the risers seem to have INCREASED vibration in the grips. :hun:

Now, I admit, I didn't notice anything while riding; it all felt good (the risers dramatically change riding... it'll take me a long while to get used to it. Darn, I have to ride more now hyea.

But after I pulled into my driveway after a quick 30 miles, after shutting off the bike I noticed that, yup, my hands were tingling like they never had before.

Now, unlike some, I never had a big problem with vibration in the stock handlebars-- I never had a case of Spyder death grip, and what vibration I *did* have was quickly solved to my satisfaction with a pair of Grip Puppies. Thus, I was surprised at the new feeling tonight.

So, what's the story? Is it a case that my risers might not be bolted down tight enough? (I did it to spec, so I don't see how).

Or is it simply a case that I now need bar weights?

Like I said, peculiar. I'm going to ride it a lot this Saturday (85 and sunny, woohoo!) so I'll be able to make a better judgment. I can't rule out that my grip may have changed with the new seating position, perhaps I really was holding them tighter tonight then I normally do. Hopefully a couple hundred miles will beat that out of me.

Otherwise, bar weights it is...

 

[NancysToy]

If the vibration is not noticeable, it may not be a vibration problem at all. It could be a result of your changed arm, wrist, or neck position. If that is the case, adjusting the bars a little differently may help.

 

[daveinva]

If the vibration is not noticeable, it may not be a vibration problem at all. It could be a result of your changed arm, wrist, or neck position. If that is the case, adjusting the bars a little differently may help.

Yeah, that's what I hope. It was just really surprising, like somebody flipped a switch: no tingling for months, then boom, tingling tonight.

If it doesn't get better, before I spring for weights, I'll mess around with the adjustments (now that I can, now that my dealer found me all that extra cable slack I KNEW was under there somewhere! :2thumbs

 

[Bootie]

Vibrations

Okay, this is dang peculiar.

So, folks here know I recently installed ESI's Easy Risers. After a month-long saga getting everything right, I finally got a chance to spend some serious quality time with my Spyder this evening getting to know how it rides with the risers.

Contrary to all expectations, the risers seem to have INCREASED vibration in the grips. :hun:

Now, I admit, I didn't notice anything while riding; it all felt good (the risers dramatically change riding... it'll take me a long while to get used to it. Darn, I have to ride more now hyea.

But after I pulled into my driveway after a quick 30 miles, after shutting off the bike I noticed that, yup, my hands were tingling like they never had before.

Now, unlike some, I never had a big problem with vibration in the stock handlebars-- I never had a case of Spyder death grip, and what vibration I *did* have was quickly solved to my satisfaction with a pair of Grip Puppies. Thus, I was surprised at the new feeling tonight.

So, what's the story? Is it a case that my risers might not be bolted down tight enough? (I did it to spec, so I don't see how).

Or is it simply a case that I now need bar weights?

Like I said, peculiar. I'm going to ride it a lot this Saturday (85 and sunny, woohoo!) so I'll be able to make a better judgment. I can't rule out that my grip may have changed with the new seating position, perhaps I really was holding them tighter tonight then I normally do. Hopefully a couple hundred miles will beat that out of me.

Otherwise, bar weights it is...

OK,here we go...:lecturef_smilie:for those that are interested. Please forgive me..as I am a Recently-Retired Engineering Professor and I begin to lecture as the Fall Semester approaches.:roflblack:
Vibrations are an interesting phenomenon. A vibrating object (your handlebars) possess three important properties... Mass (the weight of the object provides KINETIC energy), Spring (the object stores POTENTIAL energy), and DAMPING (a means to dissipate the energy). The object will RESONATE at a particular frequency based on a mathematical relationship between Mass, Spring and Damping. When vibrations occur because of engine RPM, if the RPM is the same as the Resonant Frequency of the Object it will oscillate wildly and can actually AMPLIFY the vibrations. Now if the engine RPM (or whatever the input stimulus is) is either higher or lower than the resonant frequency, the amplitude of the vibration will be much less. Now let us say that your system resonated at a higher frequency than your engine RPM and therefore the vibrations were minimal. When you added risers, you add Mass and Spring Constant. This could conceivably cause the resonant frequency to decrease, bringing it into the realm of the engine RPMs. This is how you could have actually INCREASED your vibrations by adding risers. The way around the problem is to add more Mass and/or Spring and/or Increase Damping. The only practical solution, though, is to add more Mass (weights) and bring the resonant frequency to well below the realm of engine RPMs.
Take that Scotty:shemademe_smilie:

 

[retread]

Before you go for weights, try filling the handlebar with BBs, I read about this a few years ago, so when I put the old style ESI riders on my Spyder, I tried it. Worked for me.

john

 

[wyliec]

OK,here we go...:lecturef_smilie:for those that are interested. Please forgive me..as I am a Recently-Retired Engineering Professor and I begin to lecture as the Fall Semester approaches.:roflblack:

If you lived in NYS, I would definitely sit in on your class.

 

[wyliec]

Before you go for weights, try filling the handlebar with BBs, I read about this a few years ago, so when I put the old style ESI riders on my Spyder, I tried it. Worked for me.

john

I believe it was Dudley who did this and ended up with a problem b/c of a hole the bb's slipped through. I think he had a GS SE5 at the time and the hole may not have been there on the SM5.:dontknow:

 

[daveinva]

I believe it was Dudley who did this and ended up with a problem b/c of a hole the bb's slipped through. I think he had a GS SE5 at the time and the hole may not have been there on the SM5.:dontknow:

Since I have the short little riser bars, I don't see myself having that problem-- it's a sealed tube (okay, there's that small oval for the controls to "notch" in, but I'm thinking fishing weights vs. bb's and nothing would fit through there).

That said, if I do decide to go the weight route, I'm leaning towards picking up a Throttlemeister. We'll see!

 

[boborgera]

Since I have the short little riser bars, I don't see myself having that problem-- it's a sealed tube (okay, there's that small oval for the controls to "notch" in, but I'm thinking fishing weights vs. bb's and nothing would fit through there).

That said, if I do decide to go the weight route, I'm leaning towards picking up a Throttlemeister. We'll see!

Go with bar weights, While the BB's do work for some, Sometimes They tend to get into spots they shouldn't be getting into .:gaah:

 

[Bob Denman]

Stoopid suggestion for the day... pps:
Is it posible that something has loosened up just a bit?? :dontknow: I'd check for tightness before looking to quell any errant vibrations...

 

[retread]

I believe it was Dudley who did this and ended up with a problem b/c of a hole the bb's slipped through. I think he had a GS SE5 at the time and the hole may not have been there on the SM5.:dontknow:

With the ESI risers, the bar ends with the holes are cut off, the ends are capped with plugs, no holes, no problems.

john

 

[daveinva]

Stoopid suggestion for the day... pps:
Is it posible that something has loosened up just a bit?? :dontknow: I'd check for tightness before looking to quell any errant vibrations...

Not stupid at all, I already checked, it's at the specified torque tolerance.

Like I said, they didn't vibrate while I was holding them, or at least not that I noticed-- meaning, if there was vibration, it was very minor.

BUT, my hands were tingling as if they were vibrating the whole time, like how they used to vibrate when I first got the Spyder but before I put on a pair of Grip Puppies.

Which means either I was gripping too tightly (first time for everything, I guess), the risers were set off of where they should be for my position/grip (possible, and I'll mess with the adjustment), or lastly, there *was* enough new vibration to do a number on me.

Hey man, my Spyder, it's all just one big science experiment, a Rubik's Cube of a thousand different settings to tweak until I've got it all dialed in! I've found, you change any one thing-- windshield, grips, foot position, etc.-- you end up having to change *everything* to re-synch the whole thing.

Oh well, guess I have to just keep on riding the Spyder until I get it right... the horror, the horror! hyea:

 

[Bob Denman]

Now THAT'S the spirit! :2thumbs: :clap:

 

[Cooter]

Oh well, guess I have to just keep on riding the Spyder until I get it right... the horror, the horror! hyea:

:roflblack::roflblack::roflblack:

 

[hawkiii]

That said, if I do decide to go the weight route, I'm leaning towards picking up a Throttlemeister. We'll see!

I have the Throttlemeister and really like it. Comes in handy on those long rides. It does surpress alot of the vibrations.