Clutch has started to drag after bike has not been used for four weeks?

If the clutch drags you need to check the plates and the worse thing to do when a bike wont crank is to pop start it you just do more damage and defiantly only use the right oil

Back wheels often move when the lever is pulled in...this is due to hydraulic drag caused by the oil on the clutch plates and is totally normal. You should be able to stop the wheel by hand with the lever in.
With the lever out the clutch is fully engaged and the engine will therefore stall with the brake on...
As long as the wheel rotation can be stopped by hand with the clutch pulled in it's behaving normally...
Rocking the bike in gear is a method that's used to seperate the plates on a clutch that is dragging...usually if it's not been used for a while.

The clutch plates are dragging. This causes the clutch shaft to turn even when the bike is in neutral and the clutch is dis-engaged ( handle pulled in ). When the shift fork moves to engage 1st gear, the bike jumps due to the shaft rotation. When was the last oil change? Dirty oil can cause clutch drag. Also, are you using synthetic lubricants? Some of them can swell the cork on the friction plates and that swelling causes dragging.

How is your clutch? Does it slip or drag when starting out? When you put it into 1st gear when starting out does the bike lunge forward? Hold it in first gear with the clutch in and rev the bike up. See if the bike wants to move forward with the clutch in.It sounds to me like your clutch isn't set right or getting worn out. Much easier to shift at low rpms on a clutch than high rpms. I hope this helps...

It needs four stroke motorcycle engine oil, dont use car engine oil it has friction modifiers that will cause clutch slip.
20w40 is fairly standard for most *** bikes
Go to a bike shop and they can advise and will have oil filters,

It often helps to bleed the brake fluid, and clutch if it has a hydraulic activated clutch.
There may also be a couple of grease nipples on the rear suspension

Perhaps the clutch is dragging at startup now?

I've never heard of a heavy duty clutch spring making a noise. Without being able to hear the noise, It's difficult to say what you're hearing. I would suspect that the clutch might not be releasing as it should, the clutch is dragging. Here's the easy way to tell. Put the bike in low gear, hold the clutch lever in, and start the engine. If the bike tries to pull forward, the clutch is dragging.

Assuming the clutch handle on the handlebar is adjusted properly, only three things will cause the problem.

• Very dirty oil in the gearbox. The grit is causing the clutch to drag. Change oil, ride for an hour in the city then change oil again to flush out the grit.
• Worn clutch lever (at gearbox). Lever is not moving the pusher far enough to fully disengage the clutch. A new lever would be needed.
  

• Synthetic lubricant ( or oils with "special" additives), was put in gearbox. 10w40 motor oil should be used in the gearbox. Synthetics can swell the cork on the friction plates causing the clutch to drag. New friction plates will fix the problem.

The current amount of clutch drag is not enough to harness the power of an engine rev. That is why the clutch seems okay at higher revs. Please rate my answer. Thanks.

Is the clutch lever sized or is the plates sized?
Usually the plates inside sizes, all you have to do is select gear 2 or 3 without starting the bike's engine,operate the clutch lever and push the bike,it should release, the rear wheel should now rotate freely with clutch lever in operation and in gear.
Hope this helps!

i agree, sounds like the clutch is dragging, fairly common when not been used for some time..adjustment / lubrication should do the trick..good luck..