Englishman Chris Harris, the lone Brit, said the riders would know if their preparation was on track only after today's unofficial session.
"Some riders will go with bike setups they know and others will try something different with this being a new track for us," he said.
Harris predicted plenty of action on Saturday. "Speedway has its aggressive riders, the laid back ones who are more chilled, and the in-betweens. That's what makes the sport so good.
"You've got a guy like Jason Crump who can be very aggressive in the first corner but we can all be that way - that's why we are in the world championship.
"You'll definitely see that on Saturday. Being the first grand prix, everyone wants to put a benchmark down. No one will give an inch."
The promoters are expecting up to 15,000 spectators, with the gates opening at 2pm and racing starting at 4pm.