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I am not a mechanic or motorcycle technical, so here is the best description I can provide.
I have a 2015 Ducati Multi 1200S that has a stability issue at spirited speeds, most apparent at " 85-95".
The bike feels a little light on the front end and the whole bike seems to have a very bad "wobble".
The wobble is bad enough that I immediate have to slow down, due to fear of dumping it.
It is definitely worse under hard acceleration, but still does it when just cruising on the highway. Rider behind me could see the bike wobble.
This is with or without baggage on the bike.
Things I have tried to solve this.....
Shift my weight forward on the seat and lean forward - no difference
Loosen my grip on the bars and slight body position change - no difference
Different brand tires - no difference
Had dealer look to see if everything on the steering head was proper.
I then increased the rear preload - minor improvement
Just recently ...
Dealer replace the rear spring with one for my weight (225lbs) and setup the SAG - slight improvement
I increased the rear preload some more - very slight improvement.
Anyone ever experience this and or have any constructive ideas.
Keep in mind that I am not a mechanic, but will do my best to sound intelligent.
Thanks.
Terry