If the old plungers were letting fuel in then new plungers will prolly mean setting the carbs up. Sounds like you might need to adjust the fuel levels and/or reposition the clip on the jet needles, followed by a carb balance. Make sure the engine is warmed up and you've lowered the tickover revs before doing the balance, you might need to go back to change tickover settings as you start adjusting the balance.Â
