Hi, I'm planning a trip to Colorado in September. Part of our planned route is the Rainbow trial. I'm trying to decide wither to ride my KTM 640 or KTM 400 MXC. I'd like to take my 640 so I can just ride out there instead of haul. Can anyone tell me if the rainbow is to much for my 640? I'm a pretty experienced rider and I've had it in some pretty rough stuff in Arkansas, but I'd rather not tear it up as this is my main dual sport bike. The rainbow is the only questionable portion if our route. Thanks!