You should take a pic of the plug I have a uni filter, AI removed, and little drag pipes. My plugs are a little white but probably just as lean as it comes from the factory. No back-fireing at all.

Life need a little Triumph! 2008 Triumph Speedmaster, Single baffle drag pipes, lots of black powder coatin,K&N pods, AI removed, TBS needles and a procom cdi.