CREATE TABLE table_name_81 (time VARCHAR(255), rider VARCHAR(255), bike VARCHAR(255), grid VARCHAR(255))
What is the time recorded by David Salom on his Yamaha yzf-r6 when his grid was larger than 1?
    
SQL: SELECT time FROM table_name_81 WHERE bike = "yamaha yzf-r6" AND grid > 1 AND rider = "david salom"