I used to have an 87 230 quadsport i had it jetted alittle and it did 69 mph on tar. Other than being jetted it was stock.
50 to 60 mph but it gets there real fast
because the pistons wore out. itll be about 130$ to fix it
about 1.5 quarts look in the glass screen and see if it has come to top line marked on cover if not then top it off let run for a while and check again
3 quarts