You have got me to thinking... so I looked up what I think you are looking for.

I went to the California Power System web site. Looked under Rotax Parts and followed the thread to the carburetors, found the nut for the choke shaft, item 37, then in the parts list is this listing for torque. "HEX.NUT M8X1 / TORQUE: 6-7 NM / 55-62 IN.LB."

I hope this helps.

Ralph