Any ideas ??

[mark fz1 liquid silver]

Been busy and not started my bike (2006 gen2 fz1) in over 2 months so started it and it fired up first time as it's always does but for some reason it was idling at 3000 rpm as it normally idles at 1500 rpm from cold ,I then popped it in gear and it dropped back down to 1500 rpm, does anyone know why it did this as it's never done it before is it something to get checked.it has got a pc111 on it,so could this be causing the problem
Any advise would be great