Where is the ECU located?

[conwest]

Just to confirm - going by the diagrams posted in this thread, to actually remove and replace the ECU you have to pull the left side cover, the air filter cover, and the seat undertray. Am I reading correctly? I'm heading into to have this done on Saturday.
edit: re-reading Ignacios post, on a Gen I you can get to the ECU just by pulling the seat and unscrewing the undertray. Anyone with a Gen II that confirm the process is the same?

h34r: I have done it on my `07 and it is a little more involved than on the 1st gens. First off, after the seats have come off, u have to remove the gas tank trim, then the side cover followed by the filter cover shroud. Then u disconnect the plug from the ECU. After that, remove all the screws and a couple of bolts that hold down the tool tray. I found that I had to remove the seat latch from underneath the seat rail in order to have the right clearance to pull the tray far enough back in order for the front of the tray to clear the fuel tank.While holding the front of the tray raised, pull the works forward and there u have it. Now u have it in hand, turn it over and there is your prize. 2 screws and it`s off. :yahoo:

 

[turbodave_98]

[Just had my ECU replaced today at Yamaha of Cucamonga, took about 30 minutes. Will have to ride to see if there are changes in performance or mpg. Hal, you know who did not do it!! At my request they even checked the CO2 values via the two mufflers with their machine. all is in specs.

Well, I don't know exactly how to break this to you Dave, but if they shoved a probe up your twin exhaust and told you that "all is in spec" they were seriously pulling your chain. There's no way in hell they know what each individual cylinder's CO is when the ye measure it at the out put of a 4 into 1 into 2 exhaust system AFTER the Catalytic convertors!!!

Thanks Fred for your comments. I understand that the check via the 2 exhaust pipes is an incomplete test. I am never too old to learn, so thanks again.