it depends, what brand is it
how much engine oil goes in an 80cc dirt bike
about 60mph
about 800 dollars
Around 45 mph.
its broke. take it to the shop.
I think about 40 mph.
not very fast
SAE 10w30
a 50 or an 80cc how ever big they are
40:1
an 80cc to a 125cc depending on how much you weigh.
Somewhere between 45 and 50 mph.