By dis-engage do you mean not allowing the engine and trans to turn at different speeds? the adjustment for the clutch engagement involves the ramp assembly, and the adjustment in the middle of the cable in front of the front cylinder.
1st adjust the ramp assembly to just provide resistance to the screwdriver as you tighten it. then adjust the middle housing length to provide the 1/16 to 1/8 of free gap at the clutch lever to lever housing.
that should at least get you in the ballpark.
later