Strange Vibrations! Please Help By brndnpnt (Read 721 times)

[brndnpnt]

I am getting a fast feeling vibration in my seat and below it. I looked at the rear wheel bearing and from what I can tell it looks ok. Now my front tire has about 12000 miles on it and when I looked at it I noticed what looked like pyramids on it, but could a front tire cause it to vibrate under my behind and rear... Also It only does this from 50-55mph and not as bad at 60mph. I also wander if there are wheel balance weights on these tires.

Back tire is new

thank you
Brandon P

[Cruiser]

These scoots do not have balance weights. Most people use about 2 ounces of Dynabeads to balance the rear tire. I would try this first to see if it eliminates the vibration.

www.innovativebalancing.com/motorcycle.htm

[widehide]

If your front tire has those "pyramids" then it has been out of balance for a long time. The pyramids are known as cupping. They have become so bad that they are probably causing your problem vibration. The tire will go through harmonic oscillations at different speeds. Yes it can feel like it is from below or rear. Now It is too late to balance the tire and make it ride smooth, It will need to be replaced in order to have a smooth ride I have used Dynabeads on 4 scooters, It helped all but one that had a very out of round front tire.

[fubar05]

"pyramids" ? i to have just noticed a vibration , can you elaborate on the pyramids, i just put new tires front and back les than a thousand miles !

[widehide]

fubar05, what is being described here as pyramids is simply high, then low spots on the tire, a tire store might call it cupping. when a tire is out of balance it will wear unevenly. There will be a valley, then a peak. Look at google images for tire cupping.

[sprocket]

Time for a new tire...

[brndnpnt]

Thank you to all!