Unleaded
yes, but will run better on leaded
leaded fuel is economic compared to unleaded because more distance is covered with leaded than unleaded
unleaded fuel
I don't believe there is a such thing as a leaded fuel engine. All gasoline is unleaded, some just a higher grade.
the 69 used leaded fuel, you can get the heads redone and have hardened valve seats installed and you can use unleaded with no problem.
I don't think there is a way to visually tell the difference between leaded and unleaded fuel. However, leaded gasoline has become "extinct" and it is more likely that you have unleaded gasoline in the can.
Unleaded fuel should always be used in a modern engine. Leaded fuel causes a detrimental buildup that will quickly destroy your bike.
Niether its diesel
You should use unleaded fuel in your 1979 Yamaha XS 1100. While the engine can run on leaded fuel, unleaded is recommended due to its availability and compatibility with modern fuel systems. Additionally, using unleaded fuel helps prevent potential valve seat damage associated with leaded fuels. Always check the owner's manual for specific fuel recommendations.
try a mixture of half leaded and half turpentine substitute i used to use leaded, but then decided to give unleaded a shot, works better for me, and had the engine checked.. No damage
No , unleaded 87 octane
Leaded fuel which has been banned for sale in the U.S. has a lead additive added during the refinery process.