Quote:
Originally Posted by
Kev
Where did you drill the exhaust? The cat is at the very bottom of the exhaust near the link pipe.
If the exhaust is now allowing more flow you will need to increase the CO & up the idle speed to stop it cutting out.
Can you do a favor for me can you remove your left side black cover & give me the numbers off your Engine ECU, I want to see if the 2010 models are running a different ECU.
This is what you are looking for.
http://www.xt660.com/showthread.php?t=8546
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What I did was......I took the end caps off the exhausts, and then drilled about 8 holes into the ends of the exhausts, but this didn't make any differance to the sound, so I got a longer drill bit and drilled through the holes I'd already done and into the plate thats about half way down the exhausts. This makes it sound a lot better, but like I said it now cuts out after about 20 mins of riding. It was suggested that I may have damaged the cats??????
Re the ECU..........Mine is the same as the 2009 one in the 6th picture with the top line ending in number 11.