Air filters for motors and engines; air intakes for motors and engines; air cleaner assemblies for motors and engines; pre-cleaner air filter assemblies for motors and engines; air cleaner/flame arrestor assemblies for motors and engines; air cleaner vent breather assemblies for motors and engines; replacement parts for air cleaner assemblies for motors and engines; intake air boxes for motors and engines; air cleaner to carburetor adaptors for motors and engines; carburetor velocity stacks; carburetor recalibration kits comprised of air filters, jets, needles, clips washers, springs, screws and drills; oil filters for motors and engines; fuel filters for motors and engines