Replacement for 4 stroke 49cc-125cc horizontal engine,hand choke(not for cable choke or electric choke carb)Manifold intake diameter:19mm/0.75″,air filter outside diameter:35mm/1.38″,mounting bolt spacing:48mm(if size is different from your stock carb,it will not fit)This carb does not replacement for all XR70/XR70R/Z50 and early model than 2008 for CRF50 XR50Before purchasing,please check whether the size and model are suitable for the bike modelWarranty:We are always available to help our customers.Please message us for replacement or refund if you are not satisfied with the order