The first time it happened was on a real undulating roat at about 50mph and virtually knocked the plug off, the first i knew was the oil light coming on (within seconds) i killed the engine and got it collected.
All the settings are factory stock as they work well for me, and beleive me you cant here the bike grounding,termis etc.
If i were you id check out your plugs for signs of scuffing as they bottom out before the fairing, I know the roads in yorkshire are rough but this should never happen under any cicumstance
