interesting observation (servo/exhaust valve) - Page 3 - Ducati Monster Forums: Ducati Monster Motorcycle Forum
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post #21 of 39 (permalink) Old 03-30-2013, 05:36 AM
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Quote:
Originally Posted by Flaboi796 View Post
The exhaust valve cycles (open-close-open) when turned on. it's checking to make sure the servo motor is working properly but the valve is only really used between 4000 - 7000 rpm roughly...it closes to make the bike pass noise restriction requirements.

Removing the cable by itself shouldn't give you the CEL, its when you disconnect the servo motor wire harness. Your bike doesn't know if the cable is connected or not, it's just testing the motor at start up
Ahhhhhhh, that makes sense
Legend

As an FYI I tested my bike with the cable disconnected and I can feel the difference at 4000RPM, the bike is smooth in second gear. However with it connected you can feel a push-pull sensation. None of this however corrected the sound I'm hearing (High pitched metal sound - piercing). Oh well. Learned something new either way. Just have to keep listening to music while im riding to hide the noise till the dealer sorts it out.

Thanks again mate, your a legend

Thanks mate.
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post #22 of 39 (permalink) Old 03-30-2013, 05:45 AM
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not a problem!

good luck getting that strange noise figured out... no clue what that could be

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post #23 of 39 (permalink) Old 03-30-2013, 08:11 PM Thread Starter
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Still no CEL.
I'm going to leave it unhooked for now.
will let you know if I run into any problems.
Oh btw I just un-hooked it from the mid pipe not the servo.

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post #24 of 39 (permalink) Old 03-30-2013, 10:16 PM
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I disconnected the cable at the flapper and rode for about 4 hours today. I honestly couldn't tell much of a difference, just very slightly. Either way, I'm glad it's open all the time now.

Knows if you and Fiona have been doin' it !

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post #25 of 39 (permalink) Old 03-31-2013, 02:07 AM
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I removed the cable from the valve and when I turn the key on I hear the servo turn, albeit slower and longer it seems.
I did get a CEL pretty much straight away and it didn't go away until I reconnected the cable.
It did sound a little louder due to the valve being open and the bottom end did smoothen out slightly but not really that noticable.
My bike is a M795 btw with the 696 chassis and 796 engine.
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post #26 of 39 (permalink) Old 03-31-2013, 08:58 AM
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Quote:
Originally Posted by ghettogarage View Post
Still no CEL.
I'm going to leave it unhooked for now.
will let you know if I run into any problems.
Oh btw I just un-hooked it from the mid pipe not the servo.
I uhooked at the servo and no CEL. I'll update if it turns on!
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post #27 of 39 (permalink) Old 03-31-2013, 10:33 AM
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I did not get a CEL either. Here is a picture of what I disconnected . . . You just have to take that cover plate off by removing the one allen screw. Then just rotate the flapper by hand to release the tension on the cable, and it will come right off.


Knows if you and Fiona have been doin' it !

2012 Monster 796 Red
Arrow Thunder full Carbon slip-ons
Pazzo Powder Coated Red Short Levers
14T Front Sprocket
Bitubo Red Steering Damper
Speedymoto Frame and Rear Axle Sliders
Evotech Tail Tidy, Motodynamic Smoke Integrated Tail
Rizoma Radial Naked Mirrors (under mounted)
Ducati Tank Guard, Fluorescent Yellow Rim Tape
Painted "Windscreen", and Headlight Surround+Removed Signal Spacers
CNC Racing Reservoir Covers and Oil Plug
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post #28 of 39 (permalink) Old 03-31-2013, 11:48 AM
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I ended up disconnecting the cable at the valve as described by scottydoesnt. Didnt even take 5 minutes. Ive commuted all week on the bike and have gone on a couple of longer rides (today was about 130 miles) and have had no issues/CEL. Bike seems to be quite a bit smoother around the 4-5k range, the exhaust note is more consistent, and I dont get that weird hesitation from the valve closing.
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post #29 of 39 (permalink) Old 03-31-2013, 06:49 PM Thread Starter
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Thanks for the picture Scott.
Glad it seems to be working for everyone A+ my friends.

2012 796
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post #30 of 39 (permalink) Old 09-11-2015, 09:48 AM
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Thanks for the pic! I'll be doing this today. It's new to me (1 week) and it's very twitchy from 2-4k. Hoping this will help.
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