Valve adjustement

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pasoalf
Posts: 72
Joined: Tue Feb 03, 2009 9:44 pm
model: 750 Paso
year: 1987
Location: Switzerland

Valve adjustement

Post by pasoalf »

When I re-activated my Paso my mechanic was already retired. Therefore I decided to do the necessary work by myself.
Actually I don’t have the necessary equipment to adjust the valves by myself. But at least I checked them to see whether there is something to do. So I gathered all the necessary Infos and Tools to check the valves.
The Result of that you see below.
For those (I guess most of you) which are not fluent in German some translations below
Einlass = intake
Auslass = outlet
Öffner = opener
Schliesser = close
The admissible tolerances you find on my check-sheet below
Image
First of all my general Interpretation is as follows:
-With time the gap of the opener is decreasing
-With time the gap of the closer is increasing
So if you check the gaps which I measured on my 750 my interpretation of the situation is as follows:
Front cylinder opener/outlet: with 0.15 slightly outside tolerance, but as with time the gap decreases no real necessity to change something
Standing cylinder closer intaket: with 0.07 outside tolerance, should probably be adjusted.
I went to a mechanic to ask the question whether there is an urge necessity to do something. I just got the (stupid?) answer that it has to be inside the tolerances, that’s why they put the tolerances.
I just ask myself whether it does any harm to the head/engine if the gaps are a bit (max 0.05) higer?
I’ve heard that on new Ducatis the tolerances are bigger, to decrease the service intervals.
So if any of you guys has experience with valve adjustments please let me know your opinion
pasoalf
Paso 750/ 1987
Paso 906/ 1992
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higgy
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Re: Valve adjustement

Post by higgy »

Lets not over complicate the process Watch the video


PART 1


http://www.youtube.com/watch?v=dIj3nSJGPZw\


Part 2


http://www.youtube.com/watch?v=3WQY1MRlmH4


Tools required


a good quality set of feeler gauges
small screwdriver..a magnet is helpful


Something to hold the valve in place so you don't drop it into the cylinder :beer: :beer: :beer: :banghead: :banghead: :banghead:

Tools to measure the shims, MICROMETER OR GOOD VERNIER, CLOSERSHIM TOOL Shims
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
Electrocuted Birds Are Bursting Into Flames and Starting Wildfires :roll:
88 750
90 906
92 907ie
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paso750
paso grand pooh-bah
Posts: 5568
Joined: Sun Jul 18, 2004 12:00 am
model: 750 Paso
year: 1987
Location: southern Germany

Re: Valve adjustement

Post by paso750 »

higgy, that was not the question. He has already done that :)
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Brutus
Posts: 257
Joined: Sun Jan 16, 2005 12:00 am
model: 750 Paso
year: 1989
Location: The Netherlands

Re: Valve adjustement

Post by Brutus »

0,15mm on the exhaust valve is not a problem. 0,07 closing rocker should be 0,02mm. If you don't hear the valves tick when starting it cold, I wouldn't bother. Till next season or approx 5000km's or so.. :thumbup:
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Mc tool
paso grand pooh-bah
Posts: 1985
Joined: Wed Dec 05, 2007 12:35 am
model: 906 Paso
year: 1990
Location: Riverton New Zealand

Re: Valve adjustement

Post by Mc tool »

I guess it depends on your mechanic ( he's probly pissed that he's not going to get to charge you for all that labour ). I measure the clearances and any shims that require adjustment are removed . I wrap a rubber band around valve stem under the closing shim and anchor it to one of the valve cover screws to hold valve in place ( got that Higgy :P :lol: :lol: ). I use 600 wet and dry carborundum paper on a flat surface ( piece of glass ) to grind down opening shims and take the closing shims to the mechanic with the measured clearances and ask him to supply the correct shim ( he is happy to swap them for a small fee ). I like to see 4-5 thou on intake openers and 6-7 thou on the exhaust openers the closers .... if I can turn the shim with my fingers they are not to tight and if I can get a 3 thou feeler gauge in there they are to loose . I gotta say before you start panicking about the closers have a real good look at your valve retainer half circle collet things , most of your closer clearance will come from these shitty little things .... much better off with a set of MBP collets ( from Bevel heaven , product ID 876 )
I wish I was young again............Id be heaps smarter than last time
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higgy
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Re: Valve adjustement

Post by higgy »

higgy, that was not the question. He has already done that :)


watch the video :beer: :beer: :beer:

G, don't tell me you have joined the sonnic crowd adjusting your belts :fart: :fart:
I wrap a rubber band around valve stem under the closing shim and anchor it to one of the valve cover screws to hold valve in place ( got that Higgy :P :lol: :lol: )


4 sure :beer: :beer: still don't have a good way to catch the errant half ring or mbp collet :banghead: :banghead: Big dumb fingers :shock:
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
Electrocuted Birds Are Bursting Into Flames and Starting Wildfires :roll:
88 750
90 906
92 907ie
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Derek
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Re: Valve adjustement

Post by Derek »

higgy wrote: ... still don't have a good way to catch the errant half ring or mbp collet :banghead: :banghead: Big dumb fingers :shock:
I use one of them magnets on a telescopic pen things held next to the closer as I push it down. The collets just stick to it and don't get lost.
And remember to block the oil drain hole with a tissue or an earplug or something, or sure as hell if (when) you drop a collet it will go right down there. :banghead:
1994 907ie
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Mc tool
paso grand pooh-bah
Posts: 1985
Joined: Wed Dec 05, 2007 12:35 am
model: 906 Paso
year: 1990
Location: Riverton New Zealand

Re: Valve adjustement

Post by Mc tool »

[quote="Derek And remember to block the oil drain hole with a tissue or an earplug or something, or sure as hell if (when) you drop a collet it will go right down there. :banghead:[/quote]
Yeah me too :evil: the 1st time I did the valves. You know if you wanted to flick that collet down that hole it would take you a hundred tries :lol: AND ! I gotta say Im pleased to know other cleaver people have done it too :lol: :lol:
I wish I was young again............Id be heaps smarter than last time
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