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  #11  
Old 04-Oct-2011, 20:50
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unburnt fuel is ok? unburnt fuel = less power = less fun!
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Old 04-Oct-2011, 21:39
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Quote:
Originally Posted by smilo006
unburnt fuel is ok? unburnt fuel = less power = less fun!

Presumably by "ok" he means it doesn't require new cylinders, pistons and rings


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  #13  
Old 05-Oct-2011, 22:05
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Quote:
Originally Posted by antonye
Presumably by "ok" he means it doesn't require new cylinders, pistons and rings

Correct
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Old 26-Jan-2012, 22:33
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Turns out I dont think this is unburt fuel now.

One mate thinks its a valve stem seal.

So, I may have a stem seal damaged as the bike is smoking on part throttle.

Does anyone know if the stem seals can be changed without taking the cylinder head off?

I don't have an exploded drawing showing the arrangement.

If the stem seals are pressed into the valve guides then I would think the head has to come off.
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Old 26-Jan-2012, 23:33
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Here you go....
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File Type: jpg 996_valves.jpg (226.4 KB, 18 views)


I'd rather die peacefully in my sleep like my Grandfather,
than screaming in terror like his passengers.- Jim Harkins

Ducati 748S | Ducati Hypermotard 1100S | Ducati Panigale V4 SP #876 | 600-620SS DesmoDue Racebike #111 <-- Sold!!
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Old 27-Jan-2012, 19:47
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Thanks for the drawing.
It doesn't answer my query regarding replacing the stem seals only - ?
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Old 27-Jan-2012, 22:09
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Quote:
Originally Posted by Manga
Thanks for the drawing.
It doesn't answer my query regarding replacing the stem seals only - ?

Alright Mr Picky!!
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File Type: jpg 996_valveseats.jpg (166.8 KB, 12 views)


I'd rather die peacefully in my sleep like my Grandfather,
than screaming in terror like his passengers.- Jim Harkins

Ducati 748S | Ducati Hypermotard 1100S | Ducati Panigale V4 SP #876 | 600-620SS DesmoDue Racebike #111 <-- Sold!!
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  #18  
Old 27-Jan-2012, 23:09
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I think he maens the rubber valve stem seals rather than seats or guides.
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Old 28-Jan-2012, 19:46
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Yes thats it, the rubber seals.

But I wonder if I should just take the engine out & check the rings as well?

I suppose a compression test will show which cylinder but won't tell me if its valves or rings?
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Old 28-Jan-2012, 20:13
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Need a Leak down test done
Then if the pressure drops you can listen for the air leak


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