

I had a power commander on my z900, but sold it within a week and got an ecu flash. An ecu flash or dyno tune (which may not as you say be available yet) allows changes to ignition timing, engine braking and lots of other parameters. All they do is change the duration of the fuel squirts. Power commanders will work to a degree, but they are passable yet suboptimal solutions. This is not intended to be offensive or an attack, but the nature of your question suggests you don’t have that education yet. My recommendation (the advice of an Internet stranger, so take it for the very little it’s worth) is to not make big changes to the core functioning of your nearly $20,000 rocket ship until you are very educated on all aspects of the changes you are making. You will almost certainly lose some performance by altering the mix without adjusting fueling. In addition, as mentioned this is a finely tuned system. Significant alterations to the airflow and the thus the air/fuel mixture may not make your bike blow up tomorrow, but you will almost certainly make it run lean and thus run hotter than spec, and will cause significant extra valve wear. You basically have to go to motogp bikes to get more performance than a new r1. Just off the top, you have a bad mofo of a super ultra finely tuned high performance machine. The r1 has a “breadbox” and a cat under the bike, the breadbox helps with sound mitigation for regulations and also is a significant impediment to airflow.

This is a significant change to your airflow system even if it’s the only change. From the name “decat” as others have mentioned you are at least losing the catalytic converter.
