Picking up where he left off from last year’s meeting, Harrison posted the first official lap time of the meeting with 121.97mph on his Silicone Engineering Supersport bike.
He improved this to 124.39mph on his second lap before recording the fastest lap of the afternoon - a lap of 126.09mph.
Afterwards he revealed how he encountered traffic early in the session and found the conditions testing but that it gradually improved:
’I hit traffic early in the session, but it as the session went on and we got some rubber on the track. And going into windy corner I was leant right over in a straight line! However, 126 on the first night is good going.’
There was a 50-minute delay at the start of the session to allow damp patches around the Mountain Course to dry and move marshals into position.
Although conditions were challenging with high winds on the Mountain section of the course, a number of the riders took the opportunity to get multiple laps under their belts with many completing five laps on their Supersport and Lightweight machinery.
Michael Dunlop, on his MD Racing Honda Supersport bike, also showed strong early form with 123.90mph on his third lap.
Conor Cummins described the conditions as ‘tricky’ but that didn’t stop the Ramsey man clocking 123.71mph on his fifth lap of the session in the Supersport class board, ahead of Prez Racing’s Jamie Coward (123.19mph) and James Hillier who nudged into the top five with 121.90. Gary Johnson - 122.55mph in sixth - described the conditions as ‘the toughest in 11 years’.
In the Lightweight class, Jamie Coward followed up his strong Supersport performance earlier in the session to top the Lightweight leaderboard with a best lap of 119.96mph. After the session, he revealed that the team can still make improvements:
’The Kawasaki definitely showed what it’s capable of but there’s still a few things that we can improve on. It’s a fair achievement on the first day.’
Defending champion Dunlop moved into second overall, with a lap of 118.52mph ahead of fellow Northern Ireland rider Paul Jordan, on the RC Express Kawasaki, who showed his hand with 117.45mph.
Derek McGee, who finished runner-up in last year’s race – will be looking to go one better and was fourth on the board with 116.19mph while Stefano Bonetti, fresh from his maiden international win at the North West 200, posted the fifth fastest Lightweight lap with 116.02mph on the Paton SC Project Reparto Course.
Gary Johnson signalled his intentions with a 115.80mph lap, putting his injury concerns behind him to move into sixth overall for the class.
2017 race winner Michael Rutter, riding the Bathams KMR Kawasaki, posted a time of 113.60mph/19.55.660 while John McGuinness, who completed 3 laps – his fastest 111.77 - described his first laps in the class as ‘amazing’.
Maria Costello enjoyed her first closed-road sidecar lap as a newcomer before clocking 109.40mph on her Paton in the Solo Lightweight class.
New Zealander Daniel Mettam came off his bike at the Black Hut in the Supersport session and was taken by airmed to Noble’s Hospital, but his condition was not reported to be serious.
Qualifying continues tonight, with roads closing from 4.45pm onward.
First bikes are expected to depart the Grandstand at 6.20pm.