Hi guys I got a set of pipes from a 06 flht for my bike, header and Python slipons. I had the stock 89 header and fishtails on my bike before and it was running well, good color on the plugs. I have a main 175 and pilot 48 along with sporty needle and accell acelerator pump. I'm also adding a k&n filter this season.
Any thoughts guys if I should go up a jet size well the carb is on the bench?

 

I'm no expert but my experience has been if going from a muffler or baffled system to another I didn't have to change mine. If it's a large change in diameter or your adding a different air cleaner, check it. If it were me I'd change the pipes, put in new plugs an ride it. Pull the plugs an read them occasionally until you get a feel of what it's doing.

 

Thanks I was kind of thinking the same. I guess I'll have to wait for good weather and try out the theory.