Secondary throttle plate removal

[Mitchcpc]

Question

Looks like we have some pretty smart folks here on this issue (myself not being one of them) so I'll solicit some info on what I observe.

I removed my secondaries and my gas consumption increased, my MPG went from about 30 to about 26 miles per gallon. Yet I note a common side effect of removing the secondaries may be (possibly) a "leaner" condition. Just trying to understand in not too technical terms how more gas to go the same distance can be leaner. In my view it appears that the more air is also drawing more fuel. Not so?

Seems to me that ATRE would have the same effect, or how does the ATRE react differently when opening the secondaries that prevents a possible "lean" condition?

I appreciate all the valuable knowledge sharing on this site.

Dependent upon the responses I may be sticking the secondaries back in this weeknd and getting the ATRE (GiPRO). Was that red or blue locktite I need?

 

[nico]

Re: Question

I removed my secondaries and my gas consumption increased, my MPG went from about 30 to about 26 miles per gallon. Yet I note a common side effect of removing the secondaries may be (possibly) a "leaner" condition. Just trying to understand in not too technical terms how more gas to go the same distance can be leaner. In my view it appears that the more air is also drawing more fuel. Not so?

Seems to me that ATRE would have the same effect, or how does the ATRE react differently when opening the secondaries that prevents a possible "lean" condition?

The fact that your MPG went down after removing the secondaries is indeed counter-intuitive. Assuming the only change you made to the bike was removing the secondaries, and your riding style, typical riding conditions, and method of filling the tank and calculating MPG remained similar, it is beyond me to explain how an increase in your average fuel consumption per mile could occur.

GiPRO/ATRE does not change the position of the secondaries, at least not directly. It only tricks the ECU into thinking the bike is in 4th gear, so the ECU always uses the 4th gear row of the secondary table to position the secondaries. Download TuneEdit and look at the secondary table in the 20222 map. The 4th gear row of that table will tell you the secondary throttle position throughout the RPM range.

 

[Mitchcpc]

Thanks NICO

Thanks nico, I appreciate your expertise.

 

[TriumPhil]

Thanks for setting me straight, again, idk! :wink:

 

[TurboFan]

EVERY change you make knocks the mileage off on the next tank of gas, unless you are on a long trip and ride like an old lady. I have personally, on several occasions finished most of tank, filled it with exactly 5 gallons after traveling just 100 mile for a nice even 20 mpg!! :shock: :shock: But it was fuuunnn.