Usually "Dundrod 150" was raced in this period. But I'm not able to find it on any motorcycle road racing calendar. Has it been banned for this year?

the dundrod 150 race is now going to be part of the ulster grand prix bike WEEK. it's in august and the national races [the dundrod 150] will run first, followed by the ulster international grand prix the following saturday. the dates are: august 16th to the 21st. hope this helps.
ade!