What kind of oil goes in a 1974 Yamaha enduro?
2 cycle.... since it a 2 stroke
"Enduro" means a kind of racing, or the kind of motorcycles used for enduro racing. Enduro motorcycles designed for both off-road and road use. So the are similar to dirt bikes but also have headlights, tail and brake lights and turn signals, and whatever else is required to make them usable on a road. The actual motor may be exactly the same as that used on a pure dirt bike of the same displacement.