Z1000 exhaust whistling?

Hey,

Recently just installed the arrow 4-2-2 full system on my z1000 11 plate and have noticed that they were leaking smoke slightly out the front headers so tightened them up a bit more which had stopped the smoke but has a high pitch whistle which sounds like its coming from the engine?

I didn't replace the copper gaskets for the front header so do you think this could be the cause of this?

Any help would be appreciated

Thanks

[NTECUK]

just cos you can't see any gas pass the joint don't mean a slight leaks not there.
if you can get it stationary get a length of small bore hose and use this as a stethascope to pin down the location of the noise.
why u no put new gaskets then.All that dosh and work then cut a corner .bad man

Well I'm going to get some exhaust gaskets and take it off and re fit it first then see if the solves the problem -.-

Sorted.

[Tomor]

hahahahahaha

I know Tom!

[Tomor]

Should have done the job properly the first time

Alright gay!