Suzuki Rider Shawn Giles has recorded the fastest time in the opening Qualifying session of the Australian Superbike support class at the Australian round of the World Superbikes at Phillip Island.

Giles recorded a fastest time of 1:35.729 to finish ahead of Honda's Glen Allerton, and teammate Jamie Stauffer on the first of two Friday qualifying sessions.

But despite the love of the track, crowd and the event as a whole, Giles put the race in perspective for the support riders.

"It's good -- I always enjoy riding here at Phillip Island," he said.

"It's not a part of our championship -- the most important thing for us I the Australian Championship, and this is just a support race on the side," he admitted.

"So everyone was riding with a little bit in reserve, but I am just happy to be fast at the moment, and hopefully we can be fast this afternoon."

Allerton was very happy with how his bike handled in the first qualifying session, and is looking to enjoy the Australian event to its fullest.

"I am really happy -- we haven't changed much on the bike between Eastern Creek and now -- we pretty much just took the bike straight out of the truck so I am really happy because things are working great on it," he said.

"It is an awesome weekend this weekend -- the crowd and the atmosphere, and there are no points on the line for us but everyone still wants to win in front of international race teams, so it should be a good weekend."

In the opening qualifying for the Supersport class, Jeremy Crowe took the honours with a fastest lap time on his Yamaha ahead of Bryan Staring on a Honda and Yamaha teammate Jamie Stauffer.

Crowe was pleased with the result, and will be looking to better his lap time in the second Qualifying session this afternoon.

"The bike felt really good -- we put a lot of work in at the first round of the Australian series at Eastern Creek and the bike was pretty good straight out of the box here," he said.

"We'll make a few changes for the next race, and hopefully we can pick the pace up a bit more."

In the Superstock class, Dean Bonthorne clocked in fastest ahead of Ryan Taylor and Brendan Watson.