How to remove a honda xbr 500 fuel tap

There must be a seal under the fuel valve, pull the tank and look.

drain the fuel
remove the tank
remove the tap
replace gasket or seal
replace the tap
replace the tank
put in fuel
and ride

normally there is a rubber seal that is the tap but in this case get a new tap

You have got a load of bad fuel, either dirt or water. Check the contents of your fuel tank and clean it out. Remove the fuel tap and clean the filter. You will also have to clean out the carbs.

Shut off valve at the bottom of tank. remove fuel line from carburetor and point it into an approved fuel container. Open fuel valve and drain tank. If you have a reserve setting on your valve, turn it to that to get all the fuel out. Then, look the the bowl of your carburetor. At the bottom there is a small drain line. Above that drain line is a slotted screw. Point that drain line into a container and turn the screw left to drain the fuel out of the carburetor bowl. Retighten the screw after it drains. Place your fuel tank valve to off.

vent pipe is usually the smaller of the two outlets

it could have a burnt out inlet velve or it may be the velve clearence is to tight check velve clearence first

Honda uses a vacuum triggered valve in their petcock so fuel will only flow when engine is running. the 'bottom pipe'is most likely your vacuum connection.

there is only one tank to fill on your bike, your getting confused by the reserve. The reserve is just on the fuel tap itself. It has three positions, on , off and reserve. In the on position your fuel tap will be able to drink about 90% of your fuel tank and then it wont be able to drain anymore, then you must turn your fuel tap to the reserve position and it will be able to drink rest of your tank approx 10% that is left. So next time you fill up at a petrol station make sure your fuel tap is set to on, then when your bike starts to splutter out of fuel you can turn your fuel tap to reserve and get yourself to the petrol station to fill up, making sure you then turn your tap to on again. If you keep running out on the reserve it can cause debris in your tank to clog your carb up.
hope this helps
steve

There is a fuel Tap on the skyjet however it cannot be turned on and off its always on ... Its located under the petrol tank