2006 EC300 Jetting

[BassMunn]

Hi Guys

My first "Question" Post.

I have a new to me 2006 EC 300 and need a little guidance on jetting.

I have a new top end in it and has been run in, along with a good PV refurbish.

The bike has loads of low down torque, but when I open her up in say 3rd just before it hits powerband it bogs or splutters a little and then clears and takes off like a scalded cat, if I change into the next gear as it happens it doesn't repeat the sputter.
I am also fouling plugs after 2 or 3 rides, black and wet. So I assume this is too rich somewhere.

Current setup is as follows:
Carb AS1
PJ 40
MJ 175
Needle N3EH 3rd clip

I bought a 38PJ but haven't tried it yet and I have raised the clip to the 2nd clip but haven't had a chance to ride it yet as I have the bike in pieces at the moment doing a refurbish and good clean up.

Am I going in the right direction at the moment or what are the suggestions?

Thanks
Shannon