26-04-18, 09:08 PM
Does anyone know how the self-test turns the EXUP???
I imagined it would open it right up and then close it to the 'zero'd' position - with the tabs over the hole. Mine moves it from the zero'd position even MORE closed!!! It doesn't get very far because that's as far as the valve will turn. The self-test then fails and I get the 7k error displayed.
I've taken the cables off and the valve feels free to turn. I've freed the cables up so they have decent slack and the tabs line up over the hole (zero'd).
I usually do my own work on the bike but when I went to service the valve I discovered that one of the pulley plate bolts had sheared off before I bought it and I didn't fancy trying to drill that out of there so put it in to the local mechanic. When it came back the pulley plate bolts were good and the valve serviced but I now get this 7k error. Don't ask why I'm not returning it to the mechanic - it took 6 weeks and a ton of cash last time and it's not an experience I'm in a hurry to repeat.
Anyway, I'm now wondering if I need to adjust the cables further so the valve sits rotated in a more open position so the self-test can close the valve further - currently the test is driving the valve to it's fully closed position and failing - if I adjust the cables to rotate the valve to a slightly more open position the test can then close it further like it wants to...
But is that normal - for the test to start by *closing* the valve?? Like I said, I expected it to do an open-close cycle, not close-open-close - or whatever it is supposed to do...
The servo does start to open the valve when I rev the engine up (though I don't know at what engine speed as I can't watch the pulley and the rev counter at the same time!).
BTW, thanks Yamaha for putting the servo there - I hope I never have to get it out!!! I also found that the mechanic had disconnected the electrics to the coolant filler (temperature gauge??). Ah yes, that's why I do stuff myself...