Exhaust Flap Mechanism Maintenance - Page 4 - Ducati Supersport 939 Forum
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post #31 of 40 (permalink) Old 01-15-2020, 11:38 AM
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Quote:
Originally Posted by Derek View Post
It is easiest at the servo end. There is a plastic clip that holds the cable in place at the servo end. With this removed you can pull the cable outer from its seat enabling you to wiggle the nipple from its location in the servo quadrant. Once that is off it's easy to remove the cable from the butterfly.
Thanks Derek, well explained.
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post #32 of 40 (permalink) Old 01-15-2020, 11:40 AM
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I did read this thread before but the tortured English defeated me! Reading it again I can see what the poster was saying. Thanks
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post #33 of 40 (permalink) Old 01-15-2020, 05:17 PM
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The default position of the exh valve is closed, held there by the spring. With the cable removed it will remain in the open position
One of the times mine was looked at under warranty the flap had seized in the closed position, so it pays to spray a bit of WD40 and make sure the flap is free.

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post #34 of 40 (permalink) Old 01-15-2020, 05:19 PM
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Originally Posted by Airbus330 View Post
Thanks, so many threads on this topic it got confusing.

So, with the now electrically disconnected servo in its resting position the valve is held closed, which would account for the quieter exhaust note. So, as per the Healtech instructions, it is desirable to disconnect the cable and let the springs hold the valve open. And if wanted, remove the servo entirely.

Has anyone seen any instructions on how to remove the cable from the servo? Or do you start the other end and remove the cable from the valve behind the metal plate on the muffler?

Cheers
The Ducati dealer installed the healer on mine while doing some other work. They completely removed the servo, I have it sitting in my box of parts now...
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post #35 of 40 (permalink) Old 01-15-2020, 05:46 PM
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The Ducati dealer installed the healer on mine while doing some other work. They completely removed the servo, I have it sitting in my box of parts now...
Good move Steve, did mine a year ago after a seizure and disliking the droning sound around 3000 rpm.
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post #36 of 40 (permalink) Old 01-15-2020, 07:21 PM
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Originally Posted by theresanothersteve View Post
One of the times mine was looked at under warranty the flap had seized in the closed position, so it pays to spray a bit of WD40 and make sure the flap is free.
Could you elaborate how and where to spray the WD40? I've cleaned the chain and exhaust system many time but not found the mechanism requiring service.

Thanks.

John L

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post #37 of 40 (permalink) Old 01-15-2020, 11:14 PM
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Could you elaborate how and where to spray the WD40? I've cleaned the chain and exhaust system many time but not found the mechanism requiring service.

Thanks.
Like I said, under warranty...

However, if you remove the triangular-shaped cover on the right-hand side of the catalytic convertor you should see the cable connected to the valve/ flap.

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post #38 of 40 (permalink) Old 01-16-2020, 01:18 PM
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Like I said, under warranty...

However, if you remove the triangular-shaped cover on the right-hand side of the catalytic convertor you should see the cable connected to the valve/ flap.
Thanks for mentioning the cover. Appreciate it.

I don't understand what you mean about the warranty?

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post #39 of 40 (permalink) Old 01-16-2020, 05:35 PM
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Thanks for mentioning the cover. Appreciate it.

I don't understand what you mean about the warranty?
Don't know how it works in the US but in Oz we got 2 years, unlimited Ks warranty.

Throwing a fault that brings up the check engine light is covered by warranty.

The first time it came up the dealer cleaned and lubed the cables and exhaust flap. The second time they replaced the servo and cable. When it happened I purchased the healer and they fitted it for free, claiming under warranty as cleaning the servo/ cable/ flap.

All in all, I'm happy with the local dealer; they are passionate about their product and have been extremely helpful. I wish they'd stop telling me and the wife about the Diavel 1260 demonstrator though. Not for me, but the wife loves the new Diavel.
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post #40 of 40 (permalink) Old 01-18-2020, 08:34 AM Thread Starter
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Thank you for your detailed write-up!

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