Hey, got a few with just the bike:
10 x 10s hard, 50s easy, rest 5-7 min, then 9 x 15s hard, 45s easy, rest 5-7 min, then 8 x 20s work, 40s easy. "Easy" should be very easy to maintain decent output on the work periods
Another good one: 6 x 2 min work, 2 min rest off bike. This is a good threshold workout where you aim to hold the same watts over each interval
Then of course the 10 min test for max cal's which originally was on an airdyne bike (goal used to be 300 cals but not sure conversion to Assault bike.