Wrap a piece of tape around the throttle grip and mark the throttle casting somewhere. Now mark the tape to correspond to the baseline on the throttle casting for closed and wide open. Then divide that area with two more marks to get 1/4 throttle increments. Now you can ride it and know where the problems are. 1/4, 1/2, 3/4 or full throttle position.
Go to this site and dwld the Mikki manual and track down the area that needs tuning, choose the parts, or jets and have at it.