My name is mike and I am new to the forum I have a 1998 sporster 1800 that has ran perfect untill the last time i cranked it it cranked for a second w the choke on then i went to crank it again and nothing it doesnt seem like it wants to crank as hard as the other motor that one runs fine changed the plugs checked for spark had spark no change do you think I need to rebuild the carb or does it sound like something else to you thanks for any help.