CT90 isn't that the designation for a Honda Trail 90? The motor has an OHC so in stock form normally aspirated you would run in 100cc P-P. Current record at Bonneville for 100cc P-P, is held by Katy Gassaway, type of bike is a Derbi, date record set 8/03, Record is 82.846 mph. Hope this helps.
Tom G.