Description Chrome gas tank cap (fuel cap) has a chrome outer shell and plated steel inner locking mechanism. Outer dimension is approximately 2-3/4″ (71 mm) in diameter. The inside black gasket diameter is approximately 57 mm. The inside steel plated tabbed circular metal diameter is 38 mm. The inside flat tabbed end to end distance is about 47 mm. Compatible with many other Chinese made gas dirt bikes and ATVs, as well other 4-stroke small engine applications as found on portable generators, pumps, and pressure sprayers. Note to Baja Motorsports owners: This cap is not recommended for use on Baja products. Please click here for the Baja gas cap. Specifications Outer Diameter: 2-3/4″ (71 mm) Inside Black Gasket Diameter: 57 mm Inside Steel Circular Metal Diameter: 38 mm Inside Tabbed End to End Distance: 47 mm Compatibility Baja Motorsports Dirt Runner 90 (DR90) Baja Motorsports Doodle Bug (Blitz, Dirt Bug, Racer) Baja Motorsports Mini Bike MB165 &