Thanks for the info Steve, I think it was your post on the PB forum that caught my interest.

The Carbs are F3 units. WE found these infact gave better power and over rev compaired to the larger 39.5mm PWKs. They are also much nicer off the bottom.

I figured if the f3 carbs gave better power than the PWK's they must have some magic in them, but I guess the stock carbs are really that good then?
I'm not planning on selling them yet Craig but I will let you know. They have the needles and MJ holders missing but I guess if they are the same basic carb as stock then the normal hrc jet kit stuff will work?

Cheers
Paul