Eton 40 ATV float style carb Performance jet. Factory jet in new style carburetor is a number 64 which you may find as insufficient Jetting so we offer a number 77 jet for replacement for anybody who has running issues or fuel supply issues with the new style carburetor with quick drain bowl valve and petcock made on the carburetor we do not sell any parts or jets for the original carburetor that does not have those two features.