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Old 11-16-2010, 08:38 AM   #1
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2004 ZX10R exhaust butterfly valve removal

Not sure if this is maybe a re-post but has any one disconnected their buterfly valves or heard of this on an 04 zx10 or an yother bikes, and if so good / bad?
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Old 11-16-2010, 09:11 AM   #2
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I've done it on an '07 ZX10, an '08 ZX10, and an '09 ZX6... all with no problems.

I guess you lose a bit of low-end power, but I've never really noticed it.
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Old 11-16-2010, 09:15 AM   #3
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You also need to limit the servo motor so it won't throw a code.
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Old 11-16-2010, 09:18 AM   #4
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Quote:
Originally Posted by Patrick View Post
You also need to limit the servo motor so it won't throw a code.
how is this done?
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Old 11-16-2010, 09:22 AM   #5
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if i just unhook the motor i get a fi light correct?
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Old 11-16-2010, 09:27 AM   #6
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Yea. I did it on my 08 gsxr600 pulled the ecu wire killed f1
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Old 11-16-2010, 09:38 AM   #7
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I've always pulled the cables and left the motor intact... no codes.

I do not know how to pull the motor and not get codes.
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Old 11-16-2010, 09:48 AM   #8
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i might try tonight, did anyone notice a increase in the bike wanting to lift?
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Old 11-16-2010, 09:49 AM   #9
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On the 10 if you just remove the cables most times you can get by without a code.
If you remove the servo too you'll need an eliminator.
Google it on the ZX10 forums and it'll go more in depth.
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Old 11-16-2010, 09:54 AM   #10
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ok next question whats the purpose of this valve, to tone it down or what?
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Old 11-16-2010, 10:00 AM   #11
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Quote:
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ok next question whats the purpose of this valve, to tone it down or what?
Performance, and noise... back in '04 it was probably done for performance, whereas today's bikes are for noise (my '08 CBR1000 had a "noise reducing exhaust valve").
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Old 11-16-2010, 10:03 AM   #12
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ok last question: Do you recomed this, everything i've read people like it better when the valve is outa the picture.
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Old 11-16-2010, 10:08 AM   #13
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You can't tell a difference... I've done it on 4 late model 1000cc bikes and you can't tell a difference. Maybe I can feel a bit of performance difference on a 600, but eventhen it is very minimal.
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