Exhaust Valve & Corroded Cable fittings - MVAgusta.net
 
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post #1 of 8 (permalink) Old 05-18-2015, 09:33 AM Thread Starter
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Exhaust Valve & Corroded Cable fittings

Looking for feedback and advice on replacing badly corroded fittings at the cable adjustment ends on the exhaust valve. Has anyone had the same issue and how did you resolve. I have the parts list but wondered if there is a kit and if the corrosion problem is common and has been resolved, change of material perhaps?
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Ducati 748R - 2001
MV F4R - 2010
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post #2 of 8 (permalink) Old 05-18-2015, 10:27 AM
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I would just buy some handlebar lever cable adjusters on line. That`s all those are.
http://www.motorcycle-superstore.com...WT.MC_ID=10010

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post #3 of 8 (permalink) Old 05-18-2015, 04:15 PM
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Wow! Where are you on the planet? Do they salt the roads where you ride?
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post #4 of 8 (permalink) Old 05-26-2015, 12:14 AM Thread Starter
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No salt on the roads here in Singapore, perhaps some dripping off me though but this seams to be common on other bikes (Ducati), possibly due to dissimilar metals and no isolation washers. I read through other threads where there is mention that some have removed the cables and allow the exhaust valve to remain fully open all the time. Just tried this as a 'see how' and find the bike runs very rich and even hotter than before when at low rpm and idle. It is much louder as well obviously. Looking to find some replacement cable adjusters as suggested by Flyboyk. The bike has just been fully serviced 10Kkm , it is a 2011 bike that has not seen much use. It sits without a battery installed which might be another factor on corrosion.

I now find that the rev limiter light is coming on at low rpm. This might be linked or a separate fault entirely. Anyway, will be replacing the cables and hope to resolve both issues.

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post #5 of 8 (permalink) Old 05-29-2015, 07:05 AM
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I might be wrong, but I think if you disconnect the cables then the spring keeps the valve closed, not open.
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post #6 of 8 (permalink) Old 06-03-2015, 06:23 AM Thread Starter
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I have read through several threads (http://www.mvagusta.net/forum/showthread.php?t=43816) and checked the exhaust. With cables removed the valve sits in open position. The problem I now have is that the bike has a high rpm while stationary, the warning lights are coming on while riding and the bike which runs hot anyway, is running even hotter. Not sure if the workshop removed the servo motor and this causes the high rpm. The others that have removed just the cables do not have the same problem.

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post #7 of 8 (permalink) Old 06-03-2015, 08:37 AM
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Quote:
Originally Posted by Scobie View Post
I have read through several threads (http://www.mvagusta.net/forum/showthread.php?t=43816) and checked the exhaust. With cables removed the valve sits in open position. The problem I now have is that the bike has a high rpm while stationary, the warning lights are coming on while riding and the bike which runs hot anyway, is running even hotter. Not sure if the workshop removed the servo motor and this causes the high rpm. The others that have removed just the cables do not have the same problem.
If the cable adjusters were that corroded maybe the valve itself is corroded? Perhaps the cables were pulling as far as they could and now without them the valve is not fully open.
I would visually confirm that the valve is in the open position and then wire it open if needed.

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post #8 of 8 (permalink) Old 06-04-2015, 06:51 AM Thread Starter
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I can swing the valve manually on the spring quite easily so it is working and without cables it is sitting in the open position. The problem is that when the bike heats up and sits stationary it revs higher than it should because the valve does not close. In temperatures of 34C the bike is running very very hot all the time at low speeds. Have been to the bike shops and they have very thin cables with small heads, the workshop has throttle cable but very expensive. They are sorting out some cheaper cables with the bigger heads and hope to refit the cables next week. Also trying to order replacement cable set and will look at how to preserve the adjusters. The servo is still installed but without cables it might be rotating further and this is cause of dash warning light. That is the workshop view of it. Thanks for the feedback and comments, hope to have the bike running better next week for trip to Malaysia.

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