Check you have identified the correct parts to undo! The carbs are secured to the manifold with two circular clamps [item# 6]...
As you can see from this diagram too, there are 8 bolts that secure the manifolds to the crankcase, not four. Be careful loosening and tightening the manifold, as it can easily warp, and that's not something you can see by eye.
_________________
Andy.
NSR-WORLD.COM
Please keep all responses to Forum posts on the Forum so that others may benefit.
Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.
Check us out on Facebook! Please "like" our page!