Aftermarket exhaust and a Powercommander?

On the Harley Road King is used to have and Harley Springer I currently own, as well as my Moto Guzzi V11 I just sold, I had put an exhaust system on the bike in conjuction with either a Power-Commander (Moto Guzzi) or the stage 1 fuel injection upload (Harley).

I just picked up a new RWB VFR. After breaking it in, I plan to do the exhaust system (either Leo Vince or Staintunes). How is the stock fuel injection system with a modified exhaust system- does it also need a Power-Commander with the appropriate map to get the most out of it? I have also seen some of the posts about the O2 sensor removal/bypass (which also looks rather simple).

What do you think?

Thanks!

Carl

 

Meh... I dunno man... The PAIR bypass for me removed any desire to modify anything else... Personally I love the look of the stock exhaust... I'm thinking about getting a second set in oorder to "Gut" them and thus have better breathing but retain the stock look...

The power commander issue though...... Hmmmmmmm... My gut says that a power commander with a set of staintunes and a correct map sure would be nice but I suppose it would depend on how I was riding it? If I was doing track days with my bike the power comander would be for me... I have not seen enough significant evidence to improve performance and fuel economy to warrent the cost of both items....

My advice: Start with the very simple first... Remove/bypass O2 crap... Ride the bike for a while and then decide if you still wish to consider the investment of pipes and a PC...

 

Thanks for the advice.... Does Power Commander sell a bypass for the O2 sensors? I have read the thread on using the Radio Shack resistors and will probably take that route.

 

I've got Staintunes on mine with a K&N performance airfilter, no power commander needed and i get an extra 5 bhp

 

I have staintunes, then added the PC.
Is it worth it? Money wise, only you can answer whether the extra $300 is worth it. I would suggest if you can't afford it, you shouldn't buy the staintunes, and you probably should have bought a clean gen 3.
Is it worth it performance wise? I dunno, haven't dynoed mine. I wasn't against spending the extra $, but the dynojet map for staintunes works SO well, I couldn't see the advantage, street riding wise. IF you are after max horsepower, you should have a custom map done. But as I have found (with previous bikes) - tuning for highest HP is not usually the most "rideable" tuning.
BUT, after rambling on, I must say: adding a PC smooths out neutral throttle snatchiness very well, it also smooths out the flat spots when accelerating (the Vtec transition is indeed, much smoother - but still a transition nonetheless). The PC is a VERY tuneable device, but you really need the dyno/PC interface to get the max out of it.
I was not in it for the performance, I was trying to improve rideability. The dynojet map from their website was all I needed.

 

I have an 2003 and recently added a K&n filter, Carbon Leo Vince cans and a PC111. I had already done the o2 sensor bypass and the Pair valve block off. I am using Cozye #5 map. I removed the baffles in the cans and it runs great. After reading about gutting the cat and having a custom map made I think that is next. I can't tell you if it will be worth it to you but the 1000 bucks was well worth it to me.