The XV1000 uses a low pressure (3 psi) diaphragm fuel pump that "burps" short gulps of fuel to the carb float bowls. It is only needed to lift the fuel from the lower tank to the float level.
You can actually run WITHOUT a fuel pump, but ONLY if the top tank is completely full. As you use fuel the pressure changes and float levels vary, so eventually the bike doesn't run well. And after the fuel level is down an inch or two, it will hardly run.
If you elect to use a cheaper non-factory generic fuel pump, make sure it does not push more than 5 psi or it will overpower the float needles and push them off the seats, causing flooding.
The fuel tank capacity of the 1993 Yamaha XV Virago 1100 is 4.7 gallons. This is equivalent to 18 Liters.
The fuel tank on the 1987 Yamaha Virago 750 holds about 2.3 gallons of gas. This bike is a cruiser with an air cooled four stroke engine.
4.4 galons
I believe its around 13L
pull the gas line off of the carburetor and let it drain.
Fuel capacity is 3.6 US gal with .7 US gal reserve
You should top up your tank then add a bottle to the gas tank.
Remove the false gas tank cover via the 2 Allen screws, one on each side. The air filter is underneath it.
Install a vent hose on top of fuel tank.Run the hose up to your mouth.Whenever it starves for gas,blow into the hose.The pressure will force fuel from the tank.Buy a Virago or Kawi and you will eliminate this problem.
Pull the hoses off the carbs, stick the ends in a gas can big enough to hold all the gas in the tank, and turn the fuel petcock to "reserve."
Fuel mixture ratio for Yamaha rt100?
Having owned a 535 virago for over a year now , I have determined that it runs best on the 91 octane , which in all gas stations is the premium fuel . Any octane rating under that was not burning well at all , which leads to carbon build up in the engine , as well as sub standard performance .