Inlet valves for 1000 S - MVAgusta.net
 
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post #1 of 9 (permalink) Old 04-11-2016, 01:20 PM Thread Starter
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Inlet valves for 1000 S

Hi

Due to the problems with new parts from MV, I now got 2 second hand inlet valves for my 1000 S. My "new" valves appear to be slightly different from the original valves. On the original valves the valve stem is grinned down to 4 mm and the "outside" of the valvehead seems to be "machined". The "new" valves have 4,5 mm stem all the way and the valvehead is plain "outside" please se attached photo. The "new" valves fits in the Cylinderhead and I guess they would work fine there.

Does any of you have any experience with the valves or have an explanation for the difference. My bike is from 2004 and the "new" valves are probably from a 2006 model 1000S

Regards

Preben
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post #2 of 9 (permalink) Old 04-11-2016, 08:39 PM
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Hey Preben. Hmm... now that I see the pictures that is quite interesting. Are you sure your bike is a 2004? I was under the impression the 1000S didn't come out until 2005.

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post #3 of 9 (permalink) Old 04-11-2016, 09:08 PM
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It's possible in EU the build year could be an 2004 Curtis.

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post #4 of 9 (permalink) Old 04-12-2016, 10:49 AM Thread Starter
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According to the books/magazines I have, production of the 1000S started in May 2004. My bike was registed in Germany 22. June 2004. So my bike is a very early 1000 S. I wonder what effect it would have in the combustion chamber if I change one of the inlet Valves on 2 cylinders with the different type valve. Perhaps not a good idea??

Preben
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post #5 of 9 (permalink) Old 04-13-2016, 01:49 PM Thread Starter
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I just followed Eddypro`s interesting thread regarding "engine bolt stuffed". For me there was a very usefull photo of the Cylinderhead from a Brutale. The Inlet Valves looks like the Valves I got from Curtis. So perhaps the valves I got is from a Brutale.

Anyway I`ll try to find 2 other Valves for my 1000S.

Eddypro - I copied the photo of your Cylinderhead to use in my thread - hope its ok with you.

Regards
Preben
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post #6 of 9 (permalink) Old 04-13-2016, 08:29 PM
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send me money,I have copyright on that picture ,LOL. I personally would not do it,get the correct type.

cheers eddy
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post #7 of 9 (permalink) Old 04-18-2016, 06:41 PM
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Originally Posted by Pretrida View Post
I just followed Eddypro`s interesting thread regarding "engine bolt stuffed". For me there was a very usefull photo of the Cylinderhead from a Brutale. The Inlet Valves looks like the Valves I got from Curtis. So perhaps the valves I got is from a Brutale.

Anyway I`ll try to find 2 other Valves for my 1000S.

Eddypro - I copied the photo of your Cylinderhead to use in my thread - hope its ok with you.

Regards
Preben
Well that sucks... sorry about that man. I wish I could have helped. I was under the impression that they were from an F4...

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post #8 of 9 (permalink) Old 04-19-2016, 07:16 AM
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The dished face valves will have a lower compression ratio than the flat face valves.

Are the stems the same diameter? If I understand your post you have 4 mm stems and the new valves are 4.5..?? Stems must be same diameter. No way a larger stem is going into the guide.

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post #9 of 9 (permalink) Old 04-19-2016, 11:10 AM Thread Starter
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No problem Curtis, you tried to help

Regarding Valve stem, both are 4,5 mm, but the 1000s Valves are grinned down to 4 mm on the lower part of stem, that does not run in the guide. Made for better airflow I guess.

Still looking for 2 inlet valves for 1000S

Regards

Preben
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