plugs were just replaced last time out, which was about 4 hours with the 26mm carbs, bike felt the same as always, just finished putting on the 2 into 1 and was trying to work out the bugs and see how it felt, pulled good until about 3/4 throttle then kina leveled off. trinity kit was completely all brand new components, pulled the plugs when i got home they are medium chocolate, bone dry, no noticeable silver flecking to the naked eye, will hit them with a magnifying glass later.. bike has been a screamer since i bought it from a friend in 01, after the motor was rebuilt because he had hydro-locked it, never had any problems until the carb. change.. also was first ride with the dyna fs, which is set like my buddies banshee with the 2 into 1 on curve 2, maybe a little too aggresive before i got the carb. package tuned right....