But the 1990 250cc World Champion 's Marlboro Yamaha had already dominated the tests by then .
He kept right on through timed practice and into the race itself , leading from the second lap to defeat Wayne Gardner 's Rothmans Honda by six seconds .
But the 1990 250cc World Champion 's Marlboro Yamaha had already dominated the tests by then , and he kept right on through timed practice and into the race itself , leading from the second lap to defeat Wayne Gardner 's Rothmans Honda by six seconds .