A couple more questions about the '06 FE550E...
* Oil capacity - don't see it listed in official specs, only mentioned in the occasional oil thread at ~ 1 liter.
Is it like the KTM RFS and all in one place, or like the newer motors and in separate transmission and crankcase volumes?
* The one, large radiator - easy to put a fan kit on? Does it tend to run hot in slow technical stuff, or does that radiator do a good job?
* Battery - Is there a common upgrade similar to the KTM RFS, like swapping the Yuasa YTZ7S or YTX5L-BS battery in place of the weaker YTX4LBS. (and is there room for a bigger battery). Important if running a fan...