SCHEMA:
CREATE TABLE table_19704392_1 (modified_speed__6th_gear_ INTEGER, standard_speed__6th_gear_ VARCHAR)
USER:
when the max speed for modified speed (6th gear) where standard speed (6th gear) is 98

QUERY:
SELECT MAX(modified_speed__6th_gear_) FROM table_19704392_1 WHERE standard_speed__6th_gear_ = "98"