Join Date: Mar 2003
Location: Columbia, SC
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Re: Looking for a little help from fellow 4xers
I assume that if you are porting it, you are using a racing exhaust system on it as well? If you increase the amount of air going in, it has to have someplace to go out...by using a stock exhaust system, it could be constricting. I wouldn't mess with the injection system much, I think Honda got it pretty right the first time around with the F4i. I am not sure what year you have. I think you are covering all the bases on it so far... Sportbikes come from the factory pretty well tuned. Use a good airfilter, maybe with a ram air induction. I am by far no expert, but I ride a honda sport bike...I'm not into the race scene, but I have some friends who are. Hope this helps!