[Jukes]

Hello, I got a little problem and have no idea how to solve it.
When I'm releasing the cluch, before it bites the revs drop for a split second. If my headlights are off it's totally fine, if my full beam is on it's totally fine, if my headlights are on normal it happens every time and has only just started happening the past few weeks. I think it's a problem with the lighting as if i hold the clutch in and turn the lights on the revs don't drop, if the clutch is out it does. :?

It would be a great help if anyone has any ideas.
Thanks.

 

[Jukes]

I'm guessing it's something getting damp because it only happens when it's been out side whilst it's raining or on a damp day. No idea what tho