CREATE TABLE table_203_142 (id DECIMAL, "pos" TEXT, "no" DECIMAL, "rider" TEXT, "bike" TEXT, "laps" DECIMAL, "time" TEXT, "grid" DECIMAL, "points" DECIMAL)

who rides a bike that is the same as troy bayliss ' bike ?
SELECT "rider" FROM table_203_142 WHERE "rider" <> 'troy bayliss' AND "bike" = (SELECT "bike" FROM table_203_142 WHERE "rider" = 'troy bayliss')
SELECT "rider" FROM "table_203_142" WHERE "bike" = (SELECT "bike" FROM "table_203_142" WHERE "rider" = 'troy bayliss') AND "rider" <> 'troy bayliss'