Reigning champion Barry Burrell took charge of the opening practice session as he led Kenny Macleod by 1.251secs.
The Halliwell Jones rider set a best lap of 58.191secs to top the timesheets, with Macleod closely followed by Christian Smith.
Nikki Coates was fourth quickest, with Josh Corner fifth.
ROKiT Off BMW F 900 R Cup, FP1:
1. Barry Burrell (Halliwell Jones) 58.191s
2. Kenny Macleod (True Heroes Racing) +1.251s
3. Christian Smith (SCH Motoprep by Bathams) +1.698s
4. Nikki Coates (LDC BMW by Frimley Pits Racing) +2.584
5. Josh Corner (Chasin the Racin Podcast) +2.685s