flapper

Hi everyone, i have done the flapper valve mod on my Tuono V4R1000, the bike sounds good. I tried to put the cables back in preparation for an MOT test, I photographed the cables at the servo end to make sure the lengths were the same and put it all back, it worked for a while then i got the...

Sorry if this has been covered before but is the simplest way of disconnecting the exhaust valve to just unplug the electric socket or disconnect the cables at the exhaust valve ? thanks very much in advance for any advice.

Just putting my old exhaust back on as the bike is now sold. I am trying to put the cabbles back on to the actuator valve and struggling which cabble goes where. Could some one have a quick look at there's and tell me if the cabble that comes out the top of the actuator and runs to the flap...

Don't know if this has been written up before, but here's my version. This will help you if you're changing out the whole exhaust system as far as removal of the header pipes go. Once you get your ECU flashed (I had mine done at AF1) the flapper is not in use anymore, which is fine by me. So, I...

I just want to know how to check if the flapper in the front air dam works. I disconnected the hose, as stated in other posts. I ended hooking the vacum hose back up cause the bike felt like it was struggling a bit. When i checked the flapper valve it was fully blocking the air path. But when...

This is a how to for those that are interested in doing this mod on 04 onwards bikes, i have done it on my track bike to allow more air and smoother air flow into the airbox, these bikes need as much as you can get in there, there will be some small gains regarding power, just don't ask me how...

Right. I have had many questions asked to me about this and different opinions about it so I thought I would start a topic just about it. Can anyone explain what the flapper does, why it was installed by Aprilia if it runs better without it, how to do the mod and any problems or comments...