i have an 06, i have FI cage on it and dropped it a few times and hasnt done anything. Good so far.
As far as gearing. I went to -1/+2 for 3 days and took it off and put a +10 on the back. Thats what I am rockin now. Only down fall is drops top speed a good amount. So if the high rpm's on the highway is gonna bother you I wouldnt go that far. I can deal with it so it doesnt bother me. I ride mine back and fourth to work everyday with it.
As far as gearing. I went to -1/+2 for 3 days and took it off and put a +10 on the back. Thats what I am rockin now. Only down fall is drops top speed a good amount. So if the high rpm's on the highway is gonna bother you I wouldnt go that far. I can deal with it so it doesnt bother me. I ride mine back and fourth to work everyday with it.