BE CAREFUL!! Sorry to say it, this video is incorrect. In Neutral, when you accelerate a little, the valve should turn a little bit to CLOSE it (anti-Clockwise), if you continue accelerating (+6k rpm) you will see how the valve will open itslef to the max. This makes sense. Yamaha wanted the valve to be at 25% open when idling to get a smooth sound and idle, then with low throthle, the bike will close the valve to aproximately 10% to get back pressure and increase torque on lower RPM. If you continue accelerating, the servo will open the valve at 100% to release back pressure and allow higher torque and power at high RPM. In summary, when you have the bike in neutral, go to an open space (to avoid annoying people with the sound), remove the protector to expose the exup valve. Start accelerating to 4-5k RPM and the valve should close (that is why you have to set the cables so the valve has a bit of play when the bike is stop), keep accelerating progresively to 8-10k RPM and the valve should start to open until it is completely open. (see ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-1gf6NaEIUJ8.html and observe how at 2:00 the cables move in the opposite direction to the rest of the video because he accelerated harder) Have in mind that once you accelerate 3 or 4 times with the bike in neutral the valve will not move and you will need to go for a short drive and try again. This means that if you accelerate in neutral and your valve doesn't move, you DO NOT NEED TO WORRY. Go for a short ride and try again. To trully check if your valve is broken you can remove the protector and go for a ride. Start in 1st gear and accelerate to 6-8k rpm, you should be able to see the valve moving. I recommend installing a camera pointing to the zone to avoid having to look while riding. I did it and it is dangerous to look at that area while acceleratin. It is possible, though. While moving, the valve should only move to open, the closing movement that I explained with the bike in neutral should not happen (at least in my bike it does not happen). I think this is Yamaha trying to quiet the exaust a little bit when starting the bike. You can see it in this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-aNANT9N-AZo.html Now, regarding this video, I will point some parts that I want to comment about: 14:15 That play is not enough, your two circular things need to be pointing backwards more or less. 14:54 That movement is CORRECT. At low throttle, the valve should move anti-clockwise. If he had continued accelerating, the valve would have turned clockwise completely to open. 15:19 The black and silver color on the cables mean something. In my bike (R6 -2007-European Market) I have the black cable in the exterior and the silver cable in the interior. Maybe in your bike is the other way around. Try the things I told you and position them correctly, do not think that because some guy on the internet have them in the oposit position, it is right. Try it by yourself!! 15:45 You have to acceleraty smothly and consistently. I think that when you accelerate hard in Neutral, the ECU knows you are "trying to get loud sounds" and stops the servo as it is not needed. FINAL PART TO THE AUTHOR OF THIS VIDEO: Could you please try accelerating in neutral progressively to 10k RPM and tell me if my my explanation is correct ? P.S. Please note that this is what I have observed with my bike, this does not mean it is the ultimate truth and I recommend you try all these things at your bike. I am a mechanical engineer that wants to understand how the bike is designed. I have worked designing motorsport and automotive cars and I would recommend you leave your bike stock as that way you will extract the maximum out of it. Teams of engineers think of every detail so that bikes and cars work better. Thank you, Miguel.
May be it is true. Please check R6 manual for correct details. My case it was always closing in high RPM so i switch it. now I can feel the power it produces and no more error code
what a detailed and helpful video👍 could you tell me plz what is the disadventage for motorcycle if i disconnected only butterfly valve cables? noise, consumption??anything else?? please let me know👏
@@thangatheone904 nope, i mean if i disconnected cables and made butterfly open position what is the disadventage for motorcycle in that situation? i dont care servo motor) it stays there i know if i remove servo motor, display shows me 17,18 error code and i have to replace new one or just put the jumper on the cable what about motor life???
@@alimammadov296 No I don't see any disadvantage, if the cable if removed and still you have servo connected it will not throw error. But like the manufacture say if this return pressure is used to keep the torque high at low speed may be slightly it may affect performance at the low speed, as per me it should not matter for 4 strock
my r6 was also like this. but no error code.... the EXUP close when high rpm and open when low rpm....... No error code but im going to fix it myself lol. i think that's bad for the bike performance
