Ok, heres my question..... My brother in law has a 05 F4i and i have a 01 F4i. I have a power commander(not dyno tuned yet), yoshi rs-3 full exhaust, & a k&n air filter. All he has is a slip on Rs-3 muffler. His is a 49 state bike (bought in NV),mine is a CA model. As far as im aware the vacume canister is the only visual differance.....RIGHT....

Well then why is his so much faster than mine?

From a 60mph roll same rpm, and in thesame gear, he has a passanger and im solo, he walks away from me? WHY????

 

Get your bike tuned.

 

waiting on money but yea i know i need to do that. the thing is his is all STOCK except the slip on and ive got that and then some.
whats up with that?

 

I was always under the understanding that the PCIII could actually hinder performance if not properly tuned?!??

 

well when it comes to the pcIII i installed a base map on it from dyno-jet to the closest decription ofwhat my bike had done to it, and it ws running way to rich. It was backfiring when i let ff the gas and i could smell the unburnet fuel when it was idling.So i leaned it out and it got rid of the backfiring but my brother-in-laws bike is still faster.Like all ngines , it rus way better in the cool nights.

somebody once told me that there was a differance in the cams, but thats what im tryn to figure out.
because ven B4 i got the pcIII and all i had was K&n and full exhaust with the same tooth-count sprckets he was still fater. IDK what the hell is goin on.

 

Your untuned Power Commander is hindering your bike's performance. Simple as that.

 

ok it might be "hindering" my performance, but like i said previously with out the pcIII the 05 is still faster. if r not shure if they have somethin diff internally then thats OK just quit houning me about my "untuned"pcIII. How much do shops charge to tune PCIII's over in WI.?