Fit For NST Kazuma Baja 50cc 70cc 90cc 110cc 125cc ATV Go kart.Fit For Honda CRF50F 2004-2009 2011-2012, Honda CRF80F 2004-2009 2011-2013.Inner Diameter (intake side): 20mmMounting Center to Center: 48mmOuter Diameter(air filter side): 32mmFit For NST Kazuma Baja 50cc 70cc 90cc 110cc 125cc ATV Go kart. Fit For Honda CRF50F 2004-2009 2011-2012, Honda CRF80F 2004-2009 2011-2013. Replacement of most carbs such as Coolster, Kazuma Buyang, Coolsport, Lifan, Kazuma, AIM-EX, Honda, Redcat, Eagle; Go kart Moped Scooter Inner Diameter (intake side): 20mm Mounting Center to Center: 48mm Outer Diameter(air filter side): 32mm