Minor grinding vibrations from rear wheel at speeds above 70km/h or at fast uphill driving

4 replies [Last post]
AndY1
AndY1's picture
Offline
Joined: 06/17/2008
Points: 1071

I get some grinding vibrations from rear wheel at speeds above 70km/h or at fast uphill driving. Is this normal?
Anything below 70km/h on a flat terrain is silent drive, but above, when aerodynamic resistance becomes so big or when going 60km/h uphill, I sense some grinding vibrations coming from the rear wheel.
I do understand, that the gears have to work harder, I just want to make sure that I'm not the only one.

Is it normal?

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
Wotnopetrol
Offline
Joined: 08/22/2008
Points: 207
Minor grinding vibrations from rear wheel

I'm not getting anything like that (yet?) Andy, just the rattling from the drive when it's being pushed or it's rolling slowly without power, indeed, the faster it goes, the better it sounds.

__________________

Simon

moccasin
moccasin's picture
Offline
Joined: 07/11/2008
Points: 494
Re: Minor grinding vibrations from rear wheel

Just a thought, but if you followed up on your last note, and tightened up the rear suspension and perhaps topped up the tire pressure as well, you may be transferring more street vibrations through the bike than most people get.

In the big-bike world, air pressure, suspension stiffness and seat foam density play HUGE rolls in felt vibrations at speed, not to mention pavement conditions.

AndY1
AndY1's picture
Offline
Joined: 06/17/2008
Points: 1071
Re: Minor grinding vibrations from rear wheel

It's definately not the pavement. And I have not changed the suspension settings either. Wotnopetrol described it good. It's some sort of rattling going on from the rear tire at higher loads (speed above 70km/h or incline driving), but I'm not hearing it, I'm feeling it.

I'll keep an eye about it.

eyeinthesky
eyeinthesky's picture
Offline
Joined: 01/05/2008
Points: 127
Re: Minor grinding vibrations from rear wheel

Sounds to me like throttle encoder is out of sync, and regen kicks in for a second, this happened to me at high speeds, climbing hills under full throttle. get the Tech to readjust it, there is a rotary magnetic encoder under the motor cover that gets adjusted in conjuction with a computer, or at the handlebar using the handbrakes and killswitch, the speedo is the indicator.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
The Party's Over: Oil, War and the Fate of Industrial Societies
How to Live Well Without Owning a Car Save Money, Breathe Easier, and Get More Mileage Out of Life
High Voltage: The Fast Track to Plug In the Auto Industry A behind-the-scenes look at the robustly competitive race to dominate the market for electric cars.
Transportation in a Climate-Constrained World
Divorce Your Car! : Ending the Love Affair with the Automobile
Transportation in a Climate-Constrained World



Who's new

  • aboudie19
  • Myus
  • vikram_ram
  • শোভন শ্যাম শ্যাম
  • scooterbill
Customize This