Quick clutch question.

Hi guys

My FZR hasnt been moved for a few weeks.

I dragged it out today and it started without too much fuss so I was very happy.

Kicked up the side stand... no problem.

Knocked it into first... clutch held in and it pulls forward.

Apply the brake.. its stalls.

It seems like the clutch is slipping slightly so when i brake to hold it stationary it cuts out.

Is this just because its been stood, or do I need to break out the tools?

Cheers Pete