g'day bender . we do need the code it tells its age , what type of engine and where made and options .
take a 1/2" ring and take of the float bowl depending on the model i think you can get at it without taking anything else off , the main jet is in the nut you remove , see holes in it close to the bottom . carb cleaner and if you have air ? give it a good blow out too , or if not just blow hard . one of those bread ties will do if it wont clear .
make sure the bowl is clean , jet is cleared and the seal is still on the float bowl and they do need a clean airfilter too , give it a TAP and see what comes out if ok then refit it
hope it helps ..

, Dave