How Do You Unrestrict A Gilera DNA 50 (50Cc Bike)?
Derestricting a UK Spec DNA 50 First remove the two nylon washers in-between the front pulley halves. Remove the exhaust front pipe resonant tube (blind-ended tube) and weld over the hole. Rejet the carb with a larger main jet (standard is 56). Piaggio recommend using a 58, but we prefer a 60. Additional Performance The next step is to fit an aftermarket exhaust system.