SELECT AVG(wins) FROM table_name_84 WHERE class = "250cc" AND team = "bultaco" AND year > 1966 AND points = 8
Apa kemenangan rata -rata di kelas 250cc untuk Bultaco dengan 8 poin lebih lambat dari 1966?
CREATE TABLE table_name_84 (wins INTEGER, points VARCHAR, year VARCHAR, class VARCHAR, team VARCHAR)