F800GS unstable at higher speeds

[Baiazid]

Originally Posted by machinebuilder

How did you decide where to put it?

This setting (setting rider sag) does affect the steering geometry.

Think of the bike pivoting on the front wheel, if you raise or lower the rear of the bike (by adjusting your preload) you are changing the angle of the forks. If you get things at a bad spot it will be unstable.

The owners manual has a procedure for setting your preload.

I found this out when I rode a KLR, they are severely undersprung for a 200lb person + camping gear. The headshake scared the crap out of me.

I will search for some tutorials and see what I can do about it

This one is for ST, but can have a look:
http://www.uthd.com/jeremy/f800st_config_metric.html

[itsatdm]

Maybe you will have more confidence in this: http://www.photos4aidan.com/actions/F800GSPreload.html

[Baiazid]

Originally Posted by itsatdm

Maybe you will have more confidence in this: http://www.photos4aidan.com/actions/F800GSPreload.html

agree :)

[itsatdm]

I really wish I had the anonymous internet to guide me in 1968 when I started riding. Instead I had to learn for myself.

[runnin4melife]

It is a grand thing, knowledge at your fingertips, a plethora of porn for your viewing pleasure.... This is truly the golden age of man!

[machinebuilder]

Originally Posted by Baiazid

Yes, before these tires all was perfect.

Cannot say it does bother me too much since I don't travel often with 120kmph. Usually I do 100kmph. But it is the idea that is something wrong ....

I just realised you're talking about 60MPH, That is not that fast. I don't balance mine and have never had headshake with the K60's on the F800GS. I have had it over 70mph with all my camping gear.

If properly adjusting the preload, tire pressure (I run about 32PSI in the K60's on pavement) doesn't help, AND you are not confident of your abilitys, PLEASE get a good mechanic to look at this before something bad happens.

[itsatdm]

Originally Posted by runnin4melife

It is a grand thing, knowledge at your fingertips, a plethora of porn for your viewing pleasure.... This is truly the golden age of man!

That is why the cashier at McDonalds can't make change.Probably something simple like, the tire bead did not get seated properly.

[runnin4melife]

Don't they spit out the change now? I had some girl recently that couldn't figure out what she owed me for $19.95, I gave her a twenty.....

[Reaver]

Originally Posted by runnin4melife

Don't they spit out the change now? I had some girl recently that couldn't figure out what she owed me for $19.95, I gave her a twenty.....

I'd have said "Keep the change, you'll need it for college."




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