What to expect from a PCII

[Francesco]

I just installed a 4-2-1 from Two Brothers. The bike seems to run fine except for a small hesitation down low. If I install a PC2 will it make a noticeable difference? If so what area(s) will it make the most difference. Low, mid, or high range? Will it eliminate the low end hesitation? I'm thinking about getting a PC2 but don't want to spend the money if the cost benefit ratio isn't there. So I guess the question is simply: is it worth the money when the bike is running ok to start with.

 

[OB_jeffw]

Primary purpose of a pc2 is to optimize the air/fuel ratio (12.4:1 - 13.0:1). Assuming that you have a good map, or have one created for you at a DynoJet authorized tuner, you can expect to have your bike at it's very best (read: you will be happy with the results).

What this means is, more hp, crisper throttle response, and optimal fuel efficiency.

Now all this sounds good, but does cost a bit. If you just have one rpm area that is a problem, you can use a Yosh box to adjust, but it is a "coarse" adjustment comparred to the pc2 (pc2 has the ability to tune entire rpm range in small increments and different throttle positions).

If you can, take your bike to a dyno, without one you will play "hit and miss" with either solution.

If you can live with this one area, save your money and go ride.