Use any oil that is JASO MA motorcycle oil 10w-40 for cold climate 20w-50 for warm climate/touring. Do not use any oil that is Energy Conserving it will shorten the life of your transmission gears and wet clutch. Synthetic oils will help your bike shift easier and run cooler. Use the lowest octane fuel that will run your bike with out pinging/knocking. Probably 87 or 89 Octane it will say in your owners manual. Ethanol may cause knocking/pinging on some models. No ethanol will definitely help in vintage 70's motorcycles
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