Replace your old or cracked Harley-Davidson oil tank cap or add a new aftermarket cap to customize your bike's style right here at J&P Cycles. Each oil tank cap comes in chrome or a flat black aluminum finish, and they are easily swapped out with your existing oil tank plug. You can even add a little style to your oil cap with logo printed models with images like flames or crosses. Select a locking oil cap for Harley from the best brands in the business like Genuine James Gaskets, J&P Cycles, Roland Sands Design, V-Twin Manufacturing and more. Add new Harley Oil Tank Drain Plugs and Harley Oil Tank Dipsticks to complete your oil tank makeover with J&P Cycles today.