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  1. #1
    Newbie
    My Bike(s)
    2006 Suzuki Boulevard C90T
    Location
    Lake Tapps, WA
    Posts
    7

    Front wheel shimmy

    I have a 2006 Suzuki C90T. Today I was coming down a hill coasting and took my hands off the bars to relax the hands...yes, I know I shouldn't do this. Almost immediately, the front end began to wobble or shimmy. I tried this several times and discovered that slowing into about 45 mph is when the shimmy begins. If you let it go, it gets progressively worse. I only have about 2500 miles on the bike. Any ideas what could cause this? It is not noticeable with even the slightest grip on the bars.

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  3. #2
    Where Am I ?
    My Bike(s)
    Suzuki C90
    Location
    Idaho
    Posts
    36
    Possible air pressure. This same sort of thing was happening to me aswell at speeds under 50, I checked the air at it was only at 10psi. Scary! Now I check it every other week.

  4. #3
    Where Am I ?
    My Bike(s)
    2005 Suzuki C90
    Location
    Waldwick, New Jersey
    Posts
    41
    Could be a few things...first check tire pressure. If you have the bridgestones run them @38-40. Front and rear.

  5. #4
    Beer. Nature's Unstoppable Force.

    My Bike(s)
    '06 XB12X
    Location
    2040 N. Dale Mabry Hwy., Tampa, FL 33607
    Posts
    13,278
    Typical behavior for a C90/LC1500.

    Well known.

    All usual suspects for such behavior come up with a goose-egg.

    Best I can think....and I'm NOT a qualified technician. Just a regular Joe. Harmonic vibrations from the huge pistons in the jugs?

  6. #5
    Newbie
    My Bike(s)
    2006 Suzuki Boulevard C90T
    Location
    Lake Tapps, WA
    Posts
    7
    thanks for the input....I saw another thread on the forum about this after I asked the question that gave similar feedback. I talked to my dealer who called Suzuki tech. After they told me the bike wasn't designed to be ridden without hands on the bars, they said try increasing tire pressure as was suggested here, check the steering head and the torque on the swing arm pivot. We'll see.....

  7. #6
    Where Am I ?
    My Bike(s)
    2005 Suzuki C90
    Location
    Waldwick, New Jersey
    Posts
    41
    Well thats what THEY say. I'd find another dealer. The stock steering head bearings are crap. you can upgrade to better ones. Mine does not shake at all with my hands off the bars. I have been running 38lbs in front and have no cupping. IF Your front tire is cupped then you may be SOL. I will be changing the bearings during the winter because its just a matter of time before the stock ones go. JMHO.

  8. #7
    Newbie
    My Bike(s)
    2006 Suzuki Boulevard C90T
    Location
    Lake Tapps, WA
    Posts
    7
    Thanks, I will ask more questions about the steering head bearing upgrades. I have a couple other dealers close and i will talk to them also. Off for a ride through Yellowstone Park this week. I increased the air pressure and will just have to keep the hands on the bars!

  9. #8
    Clunked into first gear
    My Bike(s)
    '07 C90T
    Location
    Gravois Mills MO
    Posts
    217
    moorefore, I don't know where he got "typical behavior" for C90's, but I have an '07 C90T, and the only time it has shimmied is when the tire was low. I have 18,500 miles on mine now, and low front tire pressure has been the only culprit. I've heard a lot about the head bearings being crap, but I still haven't changed mine, and I don't have a shimmy. Check the pressure first!

  10. #9
    Seat Tester
    My Bike(s)
    07 c90t,purple leds on engine,kurakin rear pegs..crash bars,cobra dragsters power commander
    Location
    poconos /pa.
    Posts
    66
    i have an 07 and it shimmied on deceleration since new . between 40 and 30 mph. itried air pressure chaanges front and rear. dealer says same thing ,don`t take hands off of bars.now after 6000 miles they say its cuz of tire cupping. also have valve tick that they cant hear?????????????????

  11. #10
    Newbie
    My Bike(s)
    C50T
    Location
    Billings MT
    Posts
    9
    I have an 06 C50t with 11k. Talked to my dealer they said bearings in the head were loose. Serviced and adjusted them, that helped. Now new front tire took care of the rest of the shimmy/wobble. Have the tire balance checked. Mine threw a wieght and had a wear pattern in it before i got home off my yearly road trip.

  12. #11
    Newbie
    My Bike(s)
    2006 Suzuki Boulevard C90T
    Location
    Lake Tapps, WA
    Posts
    7
    Thanks all, I increased tire pressure to 38 psi front and rear and it did the trick, no more shimmy!

  13. #12
    Can Ride And Chew Gum
    My Bike(s)
    2007 Black S50
    Location
    Waukesha WI
    Posts
    2,126
    Here's a similar discussion that has some good info.

    http://www.motorcycle-journal.com/fo...d-wobbles.html
    As much as I've tried to get lost, everywhere I went, there I was.

  14. #13
    Puddle Runner
    My Bike(s)
    Boulevard C109RT
    Location
    Calgary Canada
    Posts
    367
    I thought this had been duplicated....
    Last edited by Loki_ca; 09-14-2008 at 07:19 PM. Reason: Couldn't delete
    Don

    08 Boulevard C109RT
    Blue - the fastest color
    Calgary Canada

  15. #14
    Where Am I ?
    My Bike(s)
    Suzuki C50
    Location
    TN/CA
    Posts
    28
    Do you have spoke wire wheels? Mine acted like it was out of balance since new. Two dealers said it was OK. I finally took it to Wheel Works in Garden Grove, CA, and they trued up the spokes. Now a cup of coffee would not spill. If you have that problem from day one, make the dealer fix the spokes.

  16. #15
    Newbie
    My Bike(s)
    2003 Suzuki Volusia Intruder VL800
    Posts
    2
    Quote Originally Posted by moorefore View Post
    I have a 2006 Suzuki C90T. Today I was coming down a hill coasting and took my hands off the bars to relax the hands...yes, I know I shouldn't do this. Almost immediately, the front end began to wobble or shimmy. I tried this several times and discovered that slowing into about 45 mph is when the shimmy begins. If you let it go, it gets progressively worse. I only have about 2500 miles on the bike. Any ideas what could cause this? It is not noticeable with even the slightest grip on the bars.


 

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