I just bought a 1991 FXSTS. It has 128,000 miles. It takes several tries to fire up. With throttle turned all the way down and the choke all the way out it would start unless I hit the throttle a couple time. I have a Mikinu carb, not what modle it is. What I'm I doing wrong? What is the procedure with these older bikes. I'm coming off a 2004 Road King, which started without a hitch.