Here’s some more frequencies to play around with. (can’t remember all sources, sorry)
TR-808
205.3, 369.6, 304.4, 522.7, 359.4–1149.9, 254.3– 627.2
Oscillators #5–6 have internal trimpots (TM2 and TM1) in series with their resistor, for factory tuning to specific frequencies (800 and 540 Hz, respectively)
DR-110
317, 465, 820, 1150
Acidlab Drumatix
671, 702, 884, 1424
Machinedrum
1.0 - 100, 1.411 - 141.1, 1.8 - 180, 2.7 - 270
Being FM synthesis there are multiples of a given base frequency which calculate the actual frequencies. Example above is just to illustrate.