There is an issue with the torque setting for the rear sprocket nuts in the workshop manual which has been causing some grief.
6-32 Table item B: "102 N.m (10.2 kgf.m, 74.0 lb-ft)"
6-38 "Rear sprocket nut: 102 N.m (10.2 kgf.m, 74.0 lb-ft)"
8-35 Table last item: "Rear sprocket nut: 102 N.m (10.2 kgf.m, 74.0 lb-ft)"
2-25 Table last item (position 24) "Rear sprocket nut: 60 N.m (6.0 kgf.m, 43.5 lb-ft)
Various calls by members of a german forum (gsx-1400-forum.de) to "Suzuki" confirmed the info in 2-25. An experienced mechanic on the forum referred to a DIN-Norm Table for threaded steel bolts in aluminum which confirmed the 60 N.m.
Do secure with threadlock even though the service manual does not specify it. I use "LiquiMoly Medium Strength".