You could replace the pet cock with an after market one, but you would need to turn it off at every stop more than 5-10 minutes. Reason being if the float sticks fuel will flow out the carb and down into the motor, not good. Also you would still need to hook up the vacuum line from the carb to the VOES, if your bike has one. In looking at the parts diagram the Vacuum line seems to have 3 ends. Fuel valves aftermarket $20-$200.OEM at about $28.
tourbox