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Speed wobble at 45mph-ish

 
Edited

Hey folks,
?
I have a 2000 W650 and the bike has developed a speed wobble around 35-45mph in 3rd or 4th gear when I let go of the handlebars.? I don't usually ride without my hands off the bars but I discovered this a while ago when I loosen my grip.? I've since changed tires, rebalanced the front tire, loosened up all the bolts and axle on the front forks to reset the alignment but to no avail.? Curious to see if you guys can think of anything that may be causing this?
?
I've attached a video of the wobble slowing down from 50mph to around 45mph.? Thanks!
--
2000 W650

W650 Wobble edited.mov
W650 Wobble edited.mov

 

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The W650 will wobble when the rear springs are not firm enough for the rider and any rear loads particularly if the rear tyre is soft.

I experienced this and found that the rear springs had been released to the softest setting after a service.

Keith

On 06/12/2024 15:48, chupaW650 via groups.io wrote:

[Edited Message Follows]

Hey folks,
?
I have a 2000 W650 and the bike has developed a speed wobble around 35-45mph in 3rd or 4th gear when I let go of the handlebars.? I don't usually ride without my hands off the bars but I discovered this a while ago when I loosen my grip.? I've since changed tires, rebalanced the front tire, loosened up all the bolts and axle on the front forks to reset the alignment but to no avail.? Curious to see if you guys can think of anything that may be causing this?
?
I've attached a video of the wobble slowing down from 50mph to around 45mph.? Thanks!
--
2000 W650
_._,_._,_
 

Front tire pumped to 29-30 psi?

Front forks & axle aligned with the pumping method?

Were the forks ever damaged in a crash?

Checked steering head bearings? Steering is smooth and easy, not notchy, not loose, not slipping?


On Fri, Dec 6, 2024 at 8:57?AM Rev via <keith.kkr=[email protected]> wrote:

The W650 will wobble when the rear springs are not firm enough for the rider and any rear loads particularly if the rear tyre is soft.

I experienced this and found that the rear springs had been released to the softest setting after a service.

Keith

On 06/12/2024 15:48, chupaW650 via wrote:

[Edited Message Follows]

Hey folks,
?
I have a 2000 W650 and the bike has developed a speed wobble around 35-45mph in 3rd or 4th gear when I let go of the handlebars.? I don't usually ride without my hands off the bars but I discovered this a while ago when I loosen my grip.? I've since changed tires, rebalanced the front tire, loosened up all the bolts and axle on the front forks to reset the alignment but to no avail.? Curious to see if you guys can think of anything that may be causing this?
?
I've attached a video of the wobble slowing down from 50mph to around 45mph.? Thanks!
--
2000 W650
 

Front tire around 28-30 PSI.? I did loosen all the front end bolts to compress the forks and of course, tighten them back to specs.? No crashes except for a few drops over the last 12 years.? Steering head bearings is fine, no notches.??
?
--
2000 W650
 

I played with the rear shocks (Hagons) from level 5-3 and the wobble was still there.? I might have to loosen the rear wheel and double check the alignment again.
--
2000 W650
 

Bike is overloaded and or your fork oil has broken down.? ?Change the fork oil and put new springs in.


On Fri, Dec 6, 2024, 10:47 AM chupaW650 via <chupa88=[email protected]> wrote:
Hey folks,
?
I have a 2000 W650 and the bike has developed a speed wobble around 35-45mph in 3rd or 4th gear when I let go of the handlebars.? I don't usually ride without my hands off the bars but I discovered this a while ago when I loosen my grip.? I've since changed tires, rebalanced the front tire, loosened up all the bolts and axle on the front forks to reset the alignment but to no avail.? Curious to see if you guys can think of anything that ay be causing this?
?
I've attached a video of the wobble slowing down from 50mph to around 45mph.? Thanks!
--
2000 W650
 

Fork oil - recently changed fork oil 10w, brand with higher viscosity (google a fork oil table). ?Made a real difference…?
?
I had a wobble but at highway speeds. ?Tires (Michelin classics) didn’t like ?Rain grooves. ?I’ll try a different brand next time. ?In the meantime a steering damper helps … I think it’s an NHK from Japan (I may be wrong on the brand). ?Easy to install but fiddly. ?Works fine, dampens wobble and provides confidence at 70+mph. ?

Maybe a dampener? ?Maybe new tires? ?The only question I have concerns your wobble at lower speeds… higher speed wobble I understand not not at such low speeds. ?

my 2 cents
?
vince?
 

Regarding new fork springs and oil, I have Racetech springs and emulators in the front installed in 2016 and new oil replaced in July of 2023.? Can't imagine those would be the problem....?
--
2000 W650
 

Chupa. I have the same Racetech springs and emulators. No speed wobble at any speed. Look elsewhere.
Don in Niagara 2000 W650

On Mon, Dec 16, 2024 at 8:10?AM chupaW650 via <chupa88=[email protected]> wrote:
Regarding new fork springs and oil, I have Racetech springs and emulators in the front installed in 2016 and new oil replaced in July of 2023.? Can't imagine those would be the problem....?
--
2000 W650

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