I had my friend bumped up my ECU up on both cylinders by 2. It seems to run just fine! I just took my bike in for the 8000 mile service and thought the dealer was going to change out my plugs. They told me that they looked great and didnt need it yet! Hope this is helpful.
You never have to get a PCIII. The PCIII with a custom map will just help your bike run at its best. Remember that all bikes come from the factory running rich to pass federal emisions regs so when you help your motor by giving it more air or a less restrictive exhaust you will make your bike run leaner. You sould at least bump up your ECU.
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