The RS series Carburettors feature a compact design which is 25% lighter than other performance carburettors, offers quick needle jet adjustment, and uses readily available standard Mikuni jets. On street engines, very rarely is there ever a requirement for additional jet purchases with this superior delivery design precisely metered fuel irrespective of what ever the air flow volume or velocity, making these a simple bolt on, hold on and go option weather it be a 750 or 1100cc engine. Carburettors are available in 34, 36, 38, and 40mm bore sizes with standard carb spacing for some Suzuki and Kawasaki motorcycles.