Originally Posted by Brimstone
Thanks for the thorough explanation! Always challenges when doing something no one else has dared. I was wondering how the rule book would affect this project. Is putting a regular 450SXF engine in the frame out of the question? I mean, only if the FIM doesn't rule in your favour...
I think the main point of this project is to use a motor that has almost 2 liters of oil. The bottom end of the 690 is basically bulletproof. The problem with most 450s is the small amount of oil and need for very routine maintenance.