Carb info 77 RM 250B

Hey #9, you can find these at some of the OEM parts sellers. Here is what Rocky Mountain ATV lists:

https://www.rockymountainatvmc.com/oem-schematic/2

Several listings as it may cover multiple revisions:

Main 310
Pilot 45
Needle 6FJ6=4B
Needle Jet Q-0, (This they list several)
Slide 1.5

This one is pretty good too, I'd go with the Q-0 needle jet, my experience is those others are way too rich.
https://www.partzilla.com/catalog/suzuki/motorcycle/1977/rm250/carburet…