It's amazing the amount of contradictory opinions one little motorcycle can generate. I've read dozens of times here that the fly removal has no affect on the traction control. I've read that the slip-on will have a noticeable affect on low-end torque in conjunction with the fly removal. Realizing that some of the wow factor is subjective, maybe all of it with out a direct apples-to-apples dyno graphing, there's not much a person can do other than experiment for themselves.
Opinions are one thing, facts are another- don't confuse them. It is a fact that a slip on will not improve your hp/tq. This fact is supported by the following details:
1) There are no dyno tests showing that a slipon does improve power
2) There is no evidence suggesting that the stock can is restrictive
Any dynotests showing a gain with a slipon ALSO include a different tune. When evaluating performance, you ALWAYS go with one mod at a time.A 6hp gain with a slipon and a tune? How do you know that it isn't ALL due to the tune? It is like the commercial for a diet herb supplement where the person says that with daily excercise, 1500 calories a day and the "fat burning" supplement, that they lost 30lbs. Gee, what role did adding daily exercise and cutting down on calories play?
Power from ditching the flies? That has been proven, acknowledged. Read up on the zx10r and you'll see that the U.S. bound bikes got overally aggressive fly action to meet noise regs, probably the same reason why our bikes are so constricted.
Does it affect tc? I haven't seen anyone post that it didn't at all.
More facts- changes in the exhaust can only potentially allow for more power if they remove restrictions. The restrictions in the C14 are in the header pipes and (maybe) hidden cat converter. Just as the fat chick rather paint her toe nails than lose 100lbs, it is much easier and cheaper to change the exhaust can than to replace the entire exhaust. And, this is a case where two mods (exhaust and tune) should be done as the same time- the aftermarket exhaust will flow so well that the bike is now out of tune with stock tuning.