Posted by =?UTF-8?B?5bqc5a+6? on February 5, 2010, 11:49 pm
> When the steering on my Ultra Classic went unstable on a sweeper
> at 80 mph I was too shit-awful-scared to give a fuck about
> the technically correct terminology, I just wanted to survive.
Well, if you could hold onto the handlebars, it was a speed *weave*
and if you your hands got knocked off the bars it was a bad speed
*wobble*.
If you were leaned over in a sweeper, and the motorcycle started
rolling and yawing all by itself you were in a speed weave.
Rolling off the throttle, tapping the rear brake, or leaning forward
stops a speed weave, but a speed wobble stops by itself, just as soon
as the front tire regains grip.
Posted by Snag on February 6, 2010, 11:25 am
?? wrote:
>> When the steering on my Ultra Classic went unstable on a sweeper
>> at 80 mph I was too shit-awful-scared to give a fuck about
>> the technically correct terminology, I just wanted to survive.
> Well, if you could hold onto the handlebars, it was a speed *weave*
> and if you your hands got knocked off the bars it was a bad speed
> *wobble*.
> If you were leaned over in a sweeper, and the motorcycle started
> rolling and yawing all by itself you were in a speed weave.
> Rolling off the throttle, tapping the rear brake, or leaning forward
> stops a speed weave, but a speed wobble stops by itself, just as soon
> as the front tire regains grip.
Yer so fulla shit ...
What he experienced what is known as rear-steer , where the rear wheel
moves sideways in relation to the frame when under load . This is fairly
common in the older Harley rubbermount baggers . They have made improvements
in the frame and rear suspension components in the new ones that have
eliminated that .
There are also several sources of aftermarket components for the older
machines to fix this .
--
Snag
"90 FLHTCU "Strider"
'39 WLDD "PopCycle"
BS 132/SENS/DOF
Posted by =?UTF-8?B?5bqc5a+6? on February 6, 2010, 11:35 am
> What he experienced what is known as rear-steer , where the rear wheel
> moves sideways in relation to the frame when under load .
ALL motorcycles steer with the rear tire, once you're going fast
enough to countersteer.
Racers don't become fa-a-a-ast until they learn to steer with the
throttle.
Kenny Roberts used to move his engines 1/4 of an inch to the left so
that the chain bending the tubular swing arm didn't cause rear-steer
under ful throttle...
> This is fairly common in the older Harley rubbermount baggers .
> They have made improvements in the frame and rear suspension
> components in the new ones that have eliminated that .
> There are also several sources of aftermarket components for the older
> machines to fix this .
Thanks for that information, but I doubt if I will buy a big twin
until The Motor Company designs a power steering system so I can
maneuver it at very low speeds in parking lots..
Posted by Road Glidin' Don on February 6, 2010, 3:00 am
> When the steering on my Ultra Classic went unstable on a sweeper
> at 80 mph I was too shit-awful-scared to give a fuck about
> the technically correct terminology, I just wanted to survive.
Ever considered trading your old FL in for an '08 or newer FL? They
have that problem fixed with the new frame, as you probably know
already.
Not that it's ever been a real problem for me yet, after 200+K on the
Road Glide...
Posted by The Mighty Quinlan on February 6, 2010, 3:12 am
Road Glidin' Don wrote:
> Ever considered trading your old FL in for an '08 or newer FL?
No, it's been beyond my reach financially (so far).
However, I had a True-Track (sp?) installed which helped. (I think.)
SQ
> Not that it's ever been a real problem for me yet, after 200+K on the
> Road Glide...
It might become a problem if your swing arm loosens up.
Apparently the problem is related to the rear wheel.
SQ
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> at 80 mph I was too shit-awful-scared to give a fuck about
> the technically correct terminology, I just wanted to survive.