Pro-Duro - Carb Jet Adjustment

[Cyborg]

I have at present got a K&N filter fitted and am thinking of fitting a Laser Pro-Duro exhaust on my XL600. Can the bike be retuned using the existing needles or do I have to get a Stage 1 DynoJet kit as well. I was intending having the bike rolling road tested.
What difference can I expect on my insurance costs?

[Rubberchicken]

Depends on the pipe. If you get the streetlegal produro then you don't have to do anything much to the jetting. If you get the sport pipe then you're going to need bigger jets...

(Most ace looking pipe evah for the transalp, by the way )

[Cyborg]

I was going to get the road legal version of the Pro-Duro. So I assume the existing jets can be adjusted to suit, best setup on a rolling road I would guess to get it exactly right.