All of you that say DON'T take them out I can assume you have not tried this.....
Mine are out.... I did it the same time I did my Ram-Air mod
i am courios if you have done any dyno test to see where you gained power and torque after modification. i know this was long long discussion in zx14 forum about secondary fly and alot of people including myself took it out and with correct map we improve the low rpm power and torque. the biggest challenge was the fuel ratio to adjusted to the point of not running lean or rich.
where do you thing you have gain power and has it change any throttle response?
All of you that say DON'T take them out I can assume you have not tried this.....
Mine are out.... I did it the same time I did my Ram-Air mod
I have a PCIII USB that I have trimmed to a Yosi 4-1 carbon on the dyno with the help of my Innovate SSI-4. This summer during dyno days the 99-08 Busa’s were lined up and guess who's pulled the highest HP that hot afternoon at 6000'? I had no more mods than any other 08 and there were some pretty tricked out early model Busa’s that had their ass handed to them. (no turbos, no NOS)
I can give you the phone number of the service manager at Grand Prix Motorsports if you’re interested. He stood right there and wasn't surprised at all by my numbers.
I have never used any other mode but A so there is no need for my secondary injectors to be spraying into a throttle plate when the fuel could be mixing in the throttle bore with high velocity air. In my personal opinion, that entire system was a waste of funds that could have gone elsewhere. I have been riding for 33 years and never fallen on my ass because the bike was too much for me to handle.
By all means, I am not telling anyone to remove them but to say: "don't mess with it...... you'll be sorry"
I have an Aprilia Direct Injected SR50cc scooter that came into this country doing only 35 mph. It has now recorded 73 mph and I am installing a custom built Holley Nitrous Oxide system on it right now. I have developed my own adjustable fuel system for it, trimmed it with the Innovate SSI-4 and given it the ability to breath.
It's all in knowing what you’re doing... You just can't add parts and take off parts and expect to see results.
A couple pics of my tweaked Aprilia engine
Out of all the forums and topics on removing the secondary throttle blades on gen2(and lord knows theres been ALOT of them)you are the frist one i have heard positive gains from. Very exciting to say the least, would loved to see what kind of "real" number differences it makes. Problem is only one way to measure it "seat of your pants o-meter". Keep up the good work high gain, love reading about people going against the grain.....even if its my own! Nothing but good things come from it 
But it was also very soft on the low end stock. I can't see how an 08 busa wouldn't gain at least a little improvement with them out as well. Doesn't suzi mainly install them to soften the low end hit and cover their a**es?
If you don't already run a PCIII or some other box, I wouldn't bother to remove them. Your O2 does not trim for fuel above 80% throttle opening.
How does a TRE unrestrict air flow ??? (T.R.E. Timing Retard Eliminator)
On the 14's the tre locks the bikes mapping in a higher gear, and since the flies open quicker in the higher gears than in the lower ones, they end up opening quicker in all the gears, and do give a noticeable increase in the low end in lower gears as well. I also rode my buds 14 with a tre
he wanted his 14 to pull as hard down low as my 1st gen busa. I'm not sure if the 2nd gen busa is set up similiar to the 14, but I think it would be? The difference between the tre on his 14 and his flies out was still very big though
just to take them out without a pc3 to improve airflow and response.
