HELP!!! 525 SX Clutch oil disappeared and simultaneous ignition oscillations!?!?

moin! I turned off my 525 sx bj. 05 yesterday in a good driving position and when I wanted to go off again today, a lot of me when I started to smoke blue (cob and cylinder before 15h new!). I thought of driving a piece and see if the smoke goes away. so I started and somehow had the feeling that my clutch comes funny and I lacked performance. then stopped after about 2 km to look after the smoke. the smoke was gone but giving gas in higher speeds was jetz t a stuttering of the engine there, so correct depressors. am then further and noticed that my clutch no longer separated and then the stutter then comes also when speeding up from a certain speed. with other words everything is ok in the lower speed range but if it goes higher, then the motor does not turn up and suspends. in order to get the clutch problem on the track I then looked into the clutch oil tank and that was empty, but nowhere to see an oil outlet. can this be seen on the normal clutch wear lie or is there somewhere in the engine what leaks??? since I had no suitable oil I could not test anything further. because of the stuttering I then checked air filters, candles, tank ventilation, petrol hose and valves and emptied the float chamber but did not help in stuttering. candle was by the way brown. can exist a connection between the missing oil and the badly running motor or are the two independent probl eme? if yes, what can be the cause of stuttering?