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I am looking for a parts manual in odd form for a 1966 Mark 3. I can't seem to find one that shows the Mark 3 parts anywhere. Want to be able to reference correct part numbers for Mark 3 specific items and check things like jet sizes for SSI 29d. Any help would be much appreciated.

Feel free to email me off list if you prefer.

Ken
M82a1@me.com

Ken, I have that manual it is kind of a hard one to find... Let me know specifically what you need and i can email it to you. scanning the entire manual would take forever otherwise i would have already uploaded it...

Joe

m82a1 wrote:I am looking for a parts manual in odd form for a 1966 Mark 3. I can't seem to find one that shows the Mark 3 parts anywhere. Want to be able to reference correct part numbers for Mark 3 specific items and check things like jet sizes for SSI 29d. Any help would be much appreciated.

Feel free to email me off list if you prefer.

Ken
M82a1@me.com

Ken

JimF, afaik founder of this forum and owner of the website, keeps a parts list for online reading: http://motoscrubs.com/Ducati_250cc_5speed_Spare_Parts_Catalogue_CI.htm.
I myself can offer a very large pdf (32MB) or a large (9MB) djvu file, can send download links.

cheers Hans

Thanks Joe. Sounds like Hans may have it already scanned in high resolution. If he can share a download link, I will go that route.

Thanks again to everyone.

Ken

Ken,

you must have received a PN.

Hans

Folks, I have found what I was looking for thanks to a forum member. I Qm trying to confirm jetting,, as well as part numbers. I am trying to confirm this is the correct jetting for a 1966 Mark 3 ? This is the info I have from my notes:
Model-Diana Mk3 USA
Year-1966-67
Dell'Orto type-SS1 29D
Size-29
Needle-M14
Main-125
Pilot-50
Slide-60
Needle pos.-2
Needle jet-265

Does this sound about right as a starting point? I have an 80 slide currently. Looking for a 60 although blanks are available. May have to cut my own.
Ken

Hi KEN,The settings you list are nominally correct,but other factors come into play. I would not alter your slide but find an alternative.I am using a 60 ,i would like to try an 80. The 125 main may be a little large, I'm using a soldered and resized one at 110 but this may be a bit small.,The 265 jet may be fine if unworn, I could not find a new one and it was suggested i try a 260,seems ok. If you are using a very wild cam you may suffer richness at low revs due to reversion (i am) and an 80 slide may work to solve this , IF i run standard UK unleaded with ethanol the carburation improves, if i use the expensive grades (no eth at the present) I suffer richness sooting the plug,I would prefer this fuel to reduce tank rust.So you can see its a bit of a lottery.Float level and valve will help to confuse if not perfect,and the bike will run and start differently depending whether the carb is truly vertical and the bike not leaning over or with a bent stand.The choke is not a choke at all and is no help for starting,flooding is needed from cold,a good spark will solve many issues.The standard idle speed adjuster on the top of the carb is hard to adjust and not reliable(neither is the tickover!).But wth the throttle well open ,the revs at 8000 and the bike cranked over on the Isle of MAN TT roads all the issues are forgotten.

To answer your question.... here is the factory original setup for your carb.
SS1 29 D
Needle- M14 (clip in 2nd groove)
Slide- 80 cut
Venturi (choke tube)- 29mm
Main Jet- 125 (120/122/128/130 where also available on request)
Idler jet- 50
Fuel bowl- 12 deg.
Float- 14 gr.
atomizer/needle jet- 265

And here are the pages from the correct manual...

One other thing worth mentioning... If your serial # is earlier than 00351 than you have a 65' and the carb is almost the same except it uses a 100 cut slide, and a 122 main jet (and it could also be a SS129A possibly) These where titled with the wrong year all the time in case you didn't already know... If you do have a 66 mk3 there are several other differences between 65 and 66 also (most notably a standard shift lever, brake lever, pegs, etc.. in place of the racing type rear-sets that the 65 had) Along with an improved kickstarter setup, which was introduced on all the narrowcase 250 models in 66