Corser's victory delighted the Australian crowd

Corser came home eight seconds ahead of Suzuki team-mate Yukio Kagayama in race one and the Japanese rider narrowed the margin to six seconds in race two.

Briton Chris Walker was ninth in race one but crashed in race two, as did James Toseland, 15th in the first race.

Corser moves to the top of the standings ahead of Kagayama.

Corser, the 1996 champion, finished first and second in the opening round in Qatar.

"I just wanted to be out in front, get my head down and see how far I could go," said Corser, a double victor in Australia in 1999.

"All the Aussie flags were out and everybody was cheering, this is a special place for me. I have a lot of great memories here."

1st race result:
1. Troy Corser (AUS) Suzuki 35min 15.199sec
2. Yukio Kagayama (JPN) Suzuki 35:23.478
3. Chris Vermeulen (AUS) Honda 35:27.750
4. Max Neukirchner (GER) Honda 35:27.960
5. Andrew Pitt (AUS) Yamaha 35:28.403
6. Norick Abe (JPN) Yamaha 35:30.315
7. Regis Laconi (FRA) Ducati 35:32.394
8. Karl Muggeridge (AUS) Honda 35:49.020
9. Chris Walker (GBR) Kawasaki 35:49.209
10. Giovanni Bussei (ITA) Kawasaki 35:57.793.

2nd race result:
1. Troy Corser (AUS) Suzuki 37:34.183
2. Yukio Kagayama (JPN) Suzuki 37:40.005
3. Max Neukirchner (GER) Honda 37:45.080
4. Chris Vermeulen (AUS) Honda 37:52.940
5. Fonsi Nieto (SPA) Ducati 38:27.272
6. Alessio Corradi (ITA) Ducati 38:28.310
7. Regis Laconi (FRA) Ducati 38:32.259
8. Norick Abe (JPN) Yamaha 38:37.511
9. Giovanni Bussei (ITA) Kawasaki 38:38.538
10. Mauro Sanchini (ITA) Kawasaki 38:42.937

World championship standings (after 2 of 11 races)
1. Troy Corser (AUS) 91pts
2. Yukio Kagayama (JPN) 85
3. Regis Laconi (FRA) 54
4. Chris Vermeulen (AUS) 50
5. Max Neukirchner (GER) 37
6. Norick Abe (JPN) 33
7. Andrew Pitt (AUS) 31
8. James Toseland (ENG) 22
9. Giovanni Bussei (ITA) 20
10. Fonsi Nieto (SPA) 17.