Twitchy issue: Im having a twitchy sterring in my 990 ADV. Would like to know about others with this issue for a cure and if they have gone to the 19/17" wheels and has made the bike more or less twitchy. I understand the 21" to 19" being more planted. But I like the 21" alot up front have the scotts damper,21x1.85 DID rim up front. And just need help and some answers! I know the BMW F800 gs has this too! Just don't understand this with such a great bike,have change tires also TKC,Conti Trail Attacks,stock.