This cap is included in all Hagan fuel door kits. You never have to remove the cap to re-fuel, just push the pump nozzle through the center flap. Made to screw into late model 1-49/64" thread filler spouts. This item may not be compatible with modern vehicle diagnostic systems.

California users or others using Vapor Recovery fueling systems: Please consider using a fueling aid such as the McCuff Sport at https://www.amazon.com/McCuff-SPORT-MCCUFF-MOTORCYCLE-FILL/dp/B002KR49QM?th=1 or the GasCard at https://www.aerostich.com/gascard.html to prevent damage to the cap.