I've been finding that my Bonneville starts wobbling slightly at higher speeds on occasional stretches of dual-carriageway and motorways, usually at about 80-85mph. I'm in a more forward-leaning position than on the stock bike with its high handlbars (as I've fitted original M-bars and peg-adjustors, with a small Givi screen), but the extra weight over the front wheel doesn't seem to be making much difference.
The wobble also seems to start earlier when I hit turbulence from vehicles ahead, especially lorries, but isn't so bad when I'm accelerating at higher speeds (rather than slowing down).
What could be causing this, and is there any kind of cure - short of buying a bigger, heavier, more powerful motorway-muncher?
