I put a set of new v-force reeds on my 05 800 Rev last season and after 5 rides, the carb boots had delaminated so badly that you could see daylight through both of them all the way across the bottom of them. After a motor rebuild, I know have Boysen Rage Cages, they are mostly aluminum and there is only a small coupler that is rubber. I assume v-force had some bad rubber or somthing like that, but still. I wont tell you that v-force is no good but.........look what happened to me and soooo many others.
Moto Tassarini (V-Force) DOES know about the problems and will send you new boots but they won't shell out any coin for your motor!! my .02$