The only explanation I could find was that the ECU (mapping) was set from the factory so the flies would open quicker on the newer bikes.
That's why. They are 100% open at 3.5 K rpm and you aren't riding hard if you are at that low of an rpm anyway. As you get more used to the bike, you will feel a spike in power at 3.5K and that was flies openning. They are partially open almost as soon as you roll at a low speed. Always full open in higher gears. Always open on fast idle before warm up. Ride the bike cold once (not good to make a habit out of this) and you will see the flies open doesn't improve a whole lot on our bike.
I do not recommend taking them out because it makes so little dif on a G2 and it is a fair amount of work with a bit more risk than most other procedures. All other G2 owners will tell you the same thing. You won't notice any change down low but you might feel a bit more power in the power band above 3.5 K where the flies are programmed to be open. I think this is due to a bit more spool up below 3K or maybe because all you have in there to obstruct air is the shaft after the flies are pulled off of it (the flies probably obstruct a little even when they are open). In any case, do your other mods first. The flies are no big deal on a G2.
You will not be able to find as close of a map for your full system if you pull flies. Most people leave them in. I am running a flies in map for my flies out 08 and it runs good and does not get hot at all. See - no big difference. The two maps i have tried both seemed to smooth out the little jump in power at 3.5K but not totally eliminate it.
If I go with a full race exhaust and remap the bike. Will it change how fast the secondary flies open?
The shaft the flies are conected to will always turn the same number of degrees at the programmed rpm. A map will not affect the ECU except for fuel/air ratios. The full system will not effect the rpm at which th flies open either but you will be able to accelerate quicker so you will be out of the 3.5K range faster. Again, if you are riding on the street, this isn't much of an issue. If you are doing serious drag racing at a strip, you would probably be revving past 3.5 for the launch anyway.
If you go to a full system, you may want to do the airbox mod pretty soon because you will get backfire on decel. The airbox mod can be done very simply once you locate the clean air hose under the airbox. It just pulls out and you can secure something in it with a hose clamp and stick it back in. There are more thorough procedures but not necessary just to get the bike running.
Here's more info on that
Daron
* Last updated by: Rook on 11/11/2009 @ 11:26 AM *
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