. But if you get your jollies from cruising down long hills on a closed throttle and using the engine braking 
of a 250 stroker while squirting in a little extra oil via the semi-disabled pre-mix set-up, then go for it.
Personally I can't see why you don't just use the autolube system and blip the throttle a bit on down shifts and other times when you perceive the autolube system might not be providing enough oil. Running premix on a road bike is just a pain in my experience. It can be useful to remove the oil pump etc on a track bike for the weight and engine clutter savings, but effectively running both systems at the same time just seems to be the worst of both worlds to me.
But, you know, whatever floats your yacht...
Wb