head shake solutions

Discussion in 'TR650' started by johnsweet, Sep 3, 2015.

  1. hhdwtmtw Contributing Member

    Location:
    Melbourne, Australia
    Husqvarna Motorcycle:
    2014 TE300
    Have a read about steering axis and trail. Head shake (instability) is when trail gets close to or in front of where the steering axis intersects the ground. Some of the ways to move trail behind the steering axis are;
    - Lower the forks in the triple clamps
    - Lower the rear of the bike
    - Increase front tyre pressure

    Proper spring and sag setup for rider and bike should get the geometry right to start with. Stability can vary with terrain such as sand which moves the contact point with the ground much further forward causing negative trail. This is where a steering stabiliser comes in handy.

    I found a good book on the topic called "Race Tech's Motorcycle Suspension Bible" in the Kindle store online.
    Mark_H likes this.
  2. cmcmullin Husqvarna
    A Class

    Location:
    Carlsbad, CA
    Husqvarna Motorcycle:
    2014 Terra 650

    Not cheap but you wont regret it. Made my bike manageable, even enjoyable, at all speeds. Without the concern whether the speed wobble would make for a screwed up experience. Despite all the posts arguing the point, for some people the standard "air pressure and balanced wheel" doesnt work! Not wanting to spend the $500 originally, I really did try everything. Remember, however, that even the stabilizer in stock configuration didnt eliminate all the speed wobble for me either. It wasnt until I changed the GPR oil to 10 weight at the recommendation of GPR that I found settings for every speed/condition. Call the guys at GPR if you run into issues they basically told me if it didnt work with the higher weight oil the would return the stabilizer and refund the money 100%. Thanks.
  3. Baddrapp Husqvarna
    AA Class

    Location:
    Yucca Valley
    Husqvarna Motorcycle:
    TR650
    The guys at GPR are great. My bike was the setup and test bike. They added the 10 weight oil in my stabilizer. The did a fantastic job.
    mag00 and cmcmullin like this.
  4. johnsweet Husqvarna
    AA Class

    Location:
    Mount Desert, Maine 04660 USA
    Husqvarna Motorcycle:
    TR650
    Other Motorcycles:
    RickmanZ Penton250 BulsSherpaTs350
    Cured my head shake, a most important modification. Took it up to speed (99 mph) solid as a rock. Before I'd have to back it down around (80 mph) Not sure of the torque sequence, fork tube bolts 1st then steering head nut 2nd?
    cmcmullin likes this.
  5. Eric Hamel Husqvarna

    Husqvarna Motorcycle:
    tr650 strada
    [IMG]
    Thanks for the input guys....sure hope it works...should be on by the end of the week...also ordered pulstar plugs....any other modifications worth doing while at it ? thanks in advance...would like to post a picture of the bike ....but seems complicated
  6. AlbertaStrada Husqvarna

    Husqvarna Motorcycle:
    2013 TR650 Strada
    Anyone own a Strada that doesn't experience a wobble at 120km/hr? lol. I just bought a 2013 Strada last week but won't be riding for another month or so…a few weeks back a deer took me and my KLR down on the hwy going to Jasper in the Canadian Rockies. Now i have all this time on my hands and am reading about all the work this 2013 will need!!

    Attached Files:

  7. Mark_H Husqvarna
    AA Class

    Location:
    Lapu Lapu Cebu Philippines
    Husqvarna Motorcycle:
    2013 TR 650 Strada; 2015 Nuda 900R
    Other Motorcycles:
    Honda XRM 125, Kawasaki Curve 115

    Yes I have a Strada that does not wobble at any speed or loading. I posted a video in this thread to show it up to 160 kph with no problems.
    The wobble is all down to tyre pressures and rear suspension setting in relation to the load on the bike and can be cured without resorting to the (band aid) method of fitting a steering damper. Better to fix the cause of the wobble if possible, rather than to try and cover it with something else.
    Johnn likes this.
  8. Johnn Husqvarna
    A Class

    Location:
    Newcastle Hunter Valley
    Husqvarna Motorcycle:
    TR650 Strada
    Other Motorcycles:
    T4 Moto Guzzi
    :oldman: What he said.

    Don't have any problems with head shake and I'm not pedantic when it comes to suspension setting or air pressure.

    It could do with some work by a suspension specialist to match the front and rear suspension as I have the rear settings quite soft and it feels light in the front with a load on the rack or giving it some, but OK with a pillion. Any issues, I would spend the money on sorting out tyres ( tyre profile can have a big effect on stability) and suspension before installing a steering damper.
    My 2 cents worth
  9. Mark_H Husqvarna
    AA Class

    Location:
    Lapu Lapu Cebu Philippines
    Husqvarna Motorcycle:
    2013 TR 650 Strada; 2015 Nuda 900R
    Other Motorcycles:
    Honda XRM 125, Kawasaki Curve 115

    Like he said :-)
  10. johnsweet Husqvarna
    AA Class

    Location:
    Mount Desert, Maine 04660 USA
    Husqvarna Motorcycle:
    TR650
    Other Motorcycles:
    RickmanZ Penton250 BulsSherpaTs350
    I really don't see what the issue is here. New tires are between $100. to $200. each. That spent equals $300 to $400. plus removal of the old and installation plus balance of the new. So best case even if you do the work yourself is $300. +- and your head shake may still be there. A gamble. New steering damper cost is $495. plus install and your done, problem is solved. No more head shake in all conditions, dirt or highway. Or so it was for me OMHO.
  11. Eric Hamel Husqvarna

    Husqvarna Motorcycle:
    tr650 strada
    Got my gpr on....whole different riding experience...totally worth it !!
    Newfoundlander and Hansi like this.
  12. Ogre_fl Husqvarna
    Pro Class

    Location:
    Cook Bayou, FL
    Husqvarna Motorcycle:
    Terra 650
    Other Motorcycles:
    Tiger 1050
    In my opinion you are simply "lucky" that you dont have wobble issues when changing from the stock tires.
    I firmly believe these bikes by design are on the ragged edge of stability and it does not take much to push them to one side or the other.

    I happen to have 2 wheel sets. The Terra 21/18 & the Strada 19/17.

    I am currently struggling with issues with the 21/18's.
    I have checked the steering bearings, the wheel balance & wheel alignments.
    I have tried every possible tire pressures.
    I have raised & dropped the forks & made every possible pre-load adjustments.

    BTW, when I throw the 19/17's on.......the bike is stable and is so almost regardless of pressures or set ups.
    That said, it was not stable when I first spoon new tires on them, it does take a few hundred miles of wobble before the bike settles in.
    The bike was also stable with the stock tires on the 21/18's, again almost regardless of pressures & suspension set up,

    Interestingly the only other bike I remember struggling this much with tires & wobble was my BMW X-Challenge.

    I hate to spend the money, but I am leaning to getting a stabilizer vs trying to find a tire combo that works on the 21/18's
  13. gullywasher Husqvarna
    AA Class

    Location:
    Monument, Colorado USA
    Husqvarna Motorcycle:
    TR650 Terra
    Other Motorcycles:
    Yamaha FZ6, Beta 300RR
    I must be one of the lucky ones because I don't have any issues on my Terra (21/18) with the stock Metzlers, and I've run them at both fairly low and fairly high pressures depending on whether or not my route involved dirt. In fact I find the stability to be very reassuring, and I'll push the bike as hard as I dare considering the semi-knob nature of the tires. I use the bike to occasionally ride with a local sport touring group often reaching speeds to the mid-nineties indicated on twisty (by SE Texas standards) roads. (They really get a kick out of seeing "the dirt bike" hang with the fast guys.) Straight lines, flowing turns, quick transitions. The bike never seems to put a foot wrong.

    Too bad the TR650s are as rare as dodos. It would be interesting to get a few that wobble together with a few that don't for to try and work out what the differences are.
    Mark_H likes this.
  14. Ogre_fl Husqvarna
    Pro Class

    Location:
    Cook Bayou, FL
    Husqvarna Motorcycle:
    Terra 650
    Other Motorcycles:
    Tiger 1050
    As noted, I have not had issues with the stock Metzlers either.
    In fact I ended up putting the Metzlers back on my X-Challenge after struggling with wobble issues using other tires.
  15. DeLewis Husqvarna
    AA Class

    Location:
    Melbourne, Australia
    Husqvarna Motorcycle:
    TR650 Strada
    On the question of steering stabilizers, has anyone tried to adapt one of the cheap generic stabilizers that are on eBay for peanuts to wor with the TR? I've been racking my brain to work out how to make one fit as an experiment.
  16. Ogre_fl Husqvarna
    Pro Class

    Location:
    Cook Bayou, FL
    Husqvarna Motorcycle:
    Terra 650
    Other Motorcycles:
    Tiger 1050
    ^ You & me both.
    I thought of trying to connect to the steering lock bracket, but it is not very stout.
    Kind of wacky and would make oil checks a pain, but maybe a plug that threads into the oil fill hole?
    DeLewis likes this.
  17. Mark_H Husqvarna
    AA Class

    Location:
    Lapu Lapu Cebu Philippines
    Husqvarna Motorcycle:
    2013 TR 650 Strada; 2015 Nuda 900R
    Other Motorcycles:
    Honda XRM 125, Kawasaki Curve 115

    Yes, there is a guy here in Philippines who is doing it. mini-DSC_0757.JPG

    mini-DSC_0758.JPG

    mini-DSC_0759.JPG

    mini-DSC_0760.JPG

    They appear to be working but I would not buy one. As far as I am concerned aftermarket Steering Dampers are like putting a Band Aid on a problem that can often be fixed in better ways.
    DeLewis and gullywasher like this.
  18. DirtyOldMan Husqvarna
    AA Class

    Location:
    Pleasant Hill MO
    Husqvarna Motorcycle:
    13 Terra
    Other Motorcycles:
    15 Beta XTrainer 04 250 RFS
    This is an odd phenomenon that seems to have as many cures as folks who experience it.
    Fwiw I'll throw out my experience. Rock solid with the stock Sahara tires. Soon as I went to
    Tkc80 front and heidenau rear, it shook bad at 65+ mph. But not always. Couldn't pin down the cause
    Can't remember everything I tried. Next set of tires, kenda big blocks, it's once again solid. If I try and wiggle
    The bars at speed, it doesn't head shake but feels maybe just a bit unstable. But that could be because I'm sensitive to it.
    See, my 13000 miles of tr650 experience didn't tell you anything did it.
  19. dmw_az Husqvarna
    AA Class

    Location:
    Phoenix, AZ
    Husqvarna Motorcycle:
    TR650 Terra
    Other Motorcycles:
    500hp Dodge SRT4
    I've had the same exact experience. The stock Saharas were rock solid at all speeds. They just didn't provide much confidence in the dirt.

    I switched to tkc80 front/ Heidenau rear and it is bad above 65. The more air pressure I run in the front, the better it is, but even at 40psi in the front it will shake bad sometimes. If it's windy, or bad air, then it's downright scary.
  20. Newfoundlander Husqvarna
    A Class

    Husqvarna Motorcycle:
    TR650 Terra
    Anyone here try removing the front sail of a fender to see if it helps? Do Strada owners experience this shake?

    When i go above 100 kph on mt Terra the bars dont shake by themselves but if i give them a little wiggle it feels really unstable. Is this what happens to you guys or do the bars shake themselves without and input from the rider?