Fits for 50cc 70cc 90cc 110cc 125cc ATV dirt bike and go kart horizontal engine. It may also fits on a CRF or XR50, 70, 90(using big bored carb) and most pit bikes, depends upon individual case. It will allow your motor bike to do deep breath and generate much more power, prolong the engine Life. Easy to install. You can return the item within 30 days without any reason, so there is no risk to try. Product description Air filter cleaner for Xr50 crf50 50 70 90 110 125 pit dirt bike atv scooter go kart . Inside diameter: 35mm. Overall height is 2.95″(72mm) Outside diameter at widest Point is 2.4″(61mm) Outside diameter at top is 2″(50mm).