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Discussion Starter · #1 ·
Dealer says aftermarket exhaust won't run as well because it doesn't come with new cpu like more expensive exhaust from Ducati. Talking about an S4R. Is this true? If you can't adjust the cpu it's not really set up for your bike? True? Thanks

Discussion Starter · #2 ·
The S4R cpu can be adjusted to a point. And some dealers maybe willing to do it. But a much easier solution is to get a PCIII when it is release for the S4R. Once it is released, putting an aftermarket pipe on an S4R will produce much better results.
You dealer wants you to buy a DP Termi slip on with a chip for $1800. I works nice and sounds good, but the full system wiht PCIII will get better results. We just have wait and be patient for now. There are not too many options yet.

· Registered
7 Posts
This waiting for S4R stuff is driving me crazy, So I have decided to make my own full exhaust system and add a
PCIII as soon as it comes out. Strati has helped me immensely
by getting me a 748 system to start with. I have the header
to the crossover done. I just need to decide on one or two
cans. I am leaning toward using 2 modified 748 cans in a similar location to the stock S4R. I believe it will look better than the Arrow or Sil but better performance is still a question.
In theroy the PCIII and dyno runs should be all I need to tune
for the pipe. Building the pipe is almost as much as fun as riding the bike and a good pacifier for the winter in new England.

Discussion Starter · #4 ·
On another board I go on there is a recurring "Chip vs. PCIII" battle. If you install new pipes, the air/fuel mixture must be modified to suit the new pipes. A new chip installed in the CPU must be specific to the new pipes you are installing, and will only work well with those pipes.

A PCIII, on the other hand, is a small computer unit placed in line between the CPU and the throttle bodies, altering the commands received by the throttle bodies to suit whatever pipes are installed. The PCIII can be re-programmed and this allows you to creat your own air/fuel mixture maps for different pipes without having to go through the process of burning a new chip. Some people consider a "Rube Goldberg" like contraption since you are placing a pc in line to fix the incorrect signals by the main CPU, but it works fine on my Moto Guzzi.

I have the aftermarket Ducati pipes and chip on my monster and it works quite well (not perfect, but close enough). I will try the PCIII for the monster if I ever change from the Termignonis.
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