clutch ?

Load up on the cable tension without the hand lever being pulled in...

You will always feel a bit of drag pedaling the bike with the engine off and the clutch pulled in to the dis-engaged position. It cannot be helped considering the extra drag caused by fact that you are turning an extra chain as well as the internal drag of the engine. Under pedal power, there are still parts whirling around inside the engine even with the clutch dis-engaged.
If you are unsure of the clutch adjustment you currently have, I hope that this can help you out:
http://motorbicycling.com/f4/clutch-cable-clutch-adjusting-procedures-22726.html