Just a stupid question. How did you guys figure out how much to cut? I mean ,I know the OP has the pic up there but how did he arrive at that conclusion? Not trying to offend, just curious.
You basically only need the rim that holds the air filter to remain. Anything else is restricting air flow. Cut out the restriction.
Hmm, and the cpu just detects the airflow and dumps more fuel to compensate? Sorry this is my first fuel injected bike, it sure is nice have having to mess with the jets.
Hmm, and the cpu just detects the airflow and dumps more fuel to compensate? Sorry this is my first fuel injected bike, it sure is nice have having to mess with the jets.
From the factory they run stupid rich though, and leaning it out a little should net a tiny bit more power.
you do mean the opposite right? Bikes are lean to meet emissions.
you do mean the opposite right? Bikes are lean to meet emissions.
To take full advantage, you'll need some method of flashing a map. PCV is the popular choice. From the factory they run stupid rich though, and leaning it out a little should net a tiny bit more power.
you do mean the opposite right? Bikes are lean to meet emissions.
I guess a EFI bike is different from car/truck EFI gas engines when it comes to fuel mapping. With a vehicle if you change intake air(increase or decrease) and change exhaust backpressure( less restrictive muffler, remove cat), the Mass airflow meter or Manifold Absolute Pressure sensor( depending on design), in conjuction with the Oxygen senor(s), will relay incoming air volume and density to the ECM and thus ECM controls injector pulse width to compensate for extra air and achieve a 14.7:1 air fuel mixtue(stoichiometric,meaning the ultimate mixture for a clean efficient burn), without useing any aftermarket programmers. Please educate me on how a bike cannot do the same, i know it has an )2 post CAT , is there no intake air measurement used on a bike.... curious and wanting to learn more about bike mapping. I am the guy to keep engine,mapping, exhaust stock on my 8, but like to learn is all.
I guess a EFI bike is different from car/truck EFI gas engines ... Please educate me on how a bike cannot do the same
Edit 3: With edit 1 I was trying to say that the stock tune may be rich while still being leaner than max power.
Just a silly question, you guys who have done this, is it after the warranty has run out? For this will comprimise the warranty from Yamaha i suppose??
I have 4years of warranty left on my bike, so dont want to do anything to comprimise that.