loosen the carb set screw and twist, pull the carb up and out - realign it and tighten back up (you might want to reseal it with some copper rtc sealant), but I never have - I probably should though...also, I run that engine in the lst2 now...do not expect much top end speed unless you get some of 8 man's plus pinions...it gets to top speed real fast and then that is it...does have quite a bit of torque though