What size carburetor is right for my machine?

What size air filter should I choose for my motorcycle?

Based on engine displacement...

• 110cc – 125cc: We recommend a diameter of 19–24 mm.
• 140cc – 160cc: 26–28 mm models are ideal.
• 250cc and above: Diameters of 30 mm and larger are suitable.
  
  We offer models for flange mounting (screw spacing typically 48 mm) as well as models for mounting in a rubber sleeve (flange).