If the jetting seemingly does not effect its running, you are overdue on some maintenance. You can not jet an engine with issues. Smokes a lot, spooge in the pipe, the right crank seal is the first suspect. 9 year old bike, whats the chances the carb float valve has been changed yearly? You can dive in and go through the top end, gaskets and a new set of rings, check the reeds and exhaust valve. The carb just needs to be done, especially when flooding issues arise. A leak down kit could help narrow down issues. Very nice try truckster, this is a NO GUY FIGURING ZONE! Might as well get out the tin foil hats, again.