Bruce Anstey (Suzuki) is right on the pace at the IoM:
In the Junior 600cc class he was the quickest with 19 minutes 03.2 seconds, an average speed of 118.81mph. his fellow Kiwi, Shaun Harris was fifth.
Then in the Production 600 class Anstey he also recorded the fastest lap with a 19 minutes 03.2 seconds time, an average speed of 118.11mph.