just got everything back together but wont start. does the exhaust have to be hooked up to start? was just checking to see if it would fire. got the pipes on but not the goat belly. didnt have an extra hand at the time. put iridium plugs in, cleaned all electrical, seems to be getting fuel. pickup coils test on the ohms meter showing around 44 while not running of course. it will try to run for a couple of seconds but dies almost immediately. any advice welcome. i did coaster and plugged the vent line from the carb that went to the emissions thing under the seat.