well, its my first post in here.
i'm not really good in english so I'm sorry for any mistakes i may fall on.

anyway, i own 2006 superduke and yesterday I was riding the bike and suddenly I've heard a very load sounds coming out of the engine, right behind the front wheel.

stopped the bike and I've checked, and i found out, the exhaust pipe which is the one is connected to the engine, just came off.

i've uploaded a picture so you can have an idea of what im talking about.



whenever i try to put the pipe back on its place it just comes out again and all the loud noisy engine sounds come up
so, any tips how to fix it ?

i cant say for sure mate but i wouldn't recommend it at all. i took mine off and took it to the garage. it only takes a car to flick a stone inside the engine and that will cause you a whole heap of problems.

The fixing plate is not welded to the pipe - there should be a collar plate welded to the pipe onto which the fixing plate clamps.

Have a look at your rear header - it's the same detail.

i've just understood what the "collar" means.... its in the picture bellow



after removing it from the fixing plate



i tried my best to remove the whole exhaust and headers pipes from the bike, but I found out that there is couple of "plugs/sensors" connected to the pipes.

check the pictures bellow








so, how can i remove them ?

the sensors just unscrew with a wrench mate. the circular collar should be welded to the pipe.

Does anybody use the manuals or parts finders or other resources these days?

Courtesy of ebay below.




http://jpegbay.com/gallery/002861377-3.html#3

so, i did everyhting you guys recommended, but im facing a little problem taking these plugs of, do you guys know which size the screw on them ?



and is there a tip on how to easily remove them ?

well.. finally i've just removed the headers from the engine but i found out that the rear pipe has a tricky part to remove it, you have to rotate it anti-clockwise for 45 degrees to take it off the chases.

check the pictures bellow:

That's the graphite ring/gasket. You might want to replace it while you're already there. They're cheap.

The things in the headers are Lambda sensors, (measure oxygen content), and they can be a pig to remove because they get bonded in to the threads with the heat. Be careful, when I removed my headers the first time they took a lot of coaxing out using penetrating oil but I nearly rounded off the flat sides in the process.

You should be considering not replacing them. Get some blanking caps and remove the whole system along with the SAS.

Also, it's worth buying replacement copper nuts for the studs that hold on the collets and headers to the cylinders. The can corrode onto the stud and cause it to snap off when you remove them next time. It's a small investment against the problems it might prevent. (happened to me so I know).

well well well... the molding job coasted me 35$ ... that was not expected



mission accomplished !

Sorry if i upset anyone, but i found this to be a very useful post, its kind of in 'real time' and is reassurance over manual etc. and is to me what forums are all about

thanks all