650cc. Recommended volume is stamped into the side of the engine case above the kick starter.
200litres
it says on your crank case it will say something like 798cm almost a quart
One quart
800cc
A Yamaha ttr 125 weighs just about 198 pounds and goes 65 mph
1 quart
a quart and a half, approximately...
It should say on the side of the case it will be like _______cc
your crank case does not take oil at all. your transmission however will take usually 1 to 1.5 quarts of approved transmission oil.
Very little since it is such a small motor. Don't overflow.
I think 1L to 1.5L will be the quantity.