Do as Phil said and loosen the nuts off as much as possable a clutch that will allow you to kickstart without slipping will normally hold when in use.
Now when i first got my shovel it dragged all the time and getting nuteral was a nightmare but i could adjust the clutch to change gear and get nuteral no probs but then it slipped in normal use ,the clutch lever i had when i first got the bike just clamped arround the bars but later i put a clutch lever with a high beam switch gear built into it and low and behold the clutch was fantastic ,it allowed me to pull the clutch in further as the lever was further out to start with due to the clutch/switch houseing and set up normally ive never had a problem since
dont know what lever youv'e got on your bike but just check out the lever for movement
hope this helps