Re: aftermarket exhaust problem
Be aware that slip-ons usually may require disconnect of the cables that control the "flapper" valve in the stock "cans", There are numerous ways to resolve the issue, but if the control servo is "disconnected" on many bikes, the FI warning light will come on. Many solutions, but in most cases a "servo buddy" which plugs into the ECU is probably the easiest method. You may want to re-map the ECU to compensate for the better free flow which can sometimes cause a lean mix condition. Depends.
I've been through this on my 08 CBR1000RR (Yoshi R77 system) and on my '12 ZX6R (Dan-Moto slip on).
Just some thoughts.
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