Diana Questions; and please welcome Karsten

[JimF]

I have set Karsten in Germany up with a usermane but since he posted these questions to me when asking for membership I thought I would re-post them here and get the ball rolling...

I have bought last year an ducati diana 4-speed single.
motor nr. DM80520 (built in 64, first time on road 65)
Now i try to restore this machine and i have a lot of questions.
The former owner has made a new tank and seat (gfk) on it and this look´s not so good.

1. i´m lookink for a original diana/daytona seat - fits a elite seat on a daytona 250?

2. a diana 250 mark 3 has a small front lamp without ignition key, where is the kill switch ?

3. the mark 3 has a very small tail light - what for a type ist it?

Can you help me

Thanks Karsten

[DewCatTea-Bob]

" I have bought last year an ducati diana 4-speed single.
motor nr. DM80520 (built in 64 "

____ The Italian-made motors converted-over to 5-speed in 1963, so for yours to be a 4-seed 1964-model, I would suspect it to be a Mototrans-made model.
However, it's my-own opinion that your D.Mk-III was probably made in 1962 in Italy.
__ I believe Eldert ought to be able to shed some light on this issue.


" a diana 250 mark 3 has a small front lamp without ignition key, where is the kill switch ? "

____ There never was any such switch ! - (To stop the engine, you turn-off the fuel pet-cocks and perhaps also dump the clutch at idle.)


" the mark 3 has a very small tail light - what for a type ist it? "

____ The very early 4-speed 'Diana Mark III' models came stock with a very small taillight-body, and did not include any brake-light. _ (As it's taillight & electrical-system were borrowed/copied from the 1962 250-Motocross/off-road model.)
And by the way, the early 'Diana Mark III' was a hopped-up off-street version of the established 1961/62 'Diana 250' road-model.


DUCATIly,
-Bob

[Eldert]

something like this ?



Eldert

[KarstenH]

Thank you all for your welcome, especially Jim for his fast reaction and his start posting.

@DewCatTeaBob - the engine number is from a early diana/daytona or Monza 250 - a fram number i couldt not found, the forme owner want make a racer from this bike, it´s come from great britain
the data is only from the V5 document - date of registration 25.05.1965, colour blue
in the next time i will dismantle the bike and look at the fork

the tail light is named in the spare parts catalog CEV 5749-9179 but google can not find such a light
i have found a in a italian web site from brezzi randellini collezionismo under motom lights a tail light, that looks like the original, but it is black.

@eldert YES this one, i have found some parts in ebay (front light, gas tank, carburetor, etc.)
but if sombody knows where i can found a seat - in italia and espain i found some Elite seats - fits this seats a Diana? I don´t know.

the bike you can see at http://classic-motorbikes.net/images/gallery/10724.jpg
there is a photo that have posted the former owner

Thank you for any information

[DewCatTea-Bob]

" @ DewCatTeaBob - the engine number is from a early diana/daytona or Monza 250 "

____ That older motor-number indicates a 4-speed model.


" the data is only from the V5 document - date of registration 25.05.1965, "

____ Couldn't that be from the LAST time it was registered (by the last owner) ?


" in italia and espain i found some Elite seats - fits this seats a Diana? "

____ I believe that all (non off-road!) pre-1966 Duke-models use the very same seat-mounting attachment-method, so while the various (pre-1966!) street-model type of seats themselves may be constructed somewhat differently, they all still fit the (n-c type) frame's seat attachment-points.


Duke-Cheers,
-Bob

[joe46ho]

Does anyone have a better picture of this tailight ? I believe i may have one, I have a small early diana tailight housing, at first i thought that it was an aprilia 4521. but now im sure it isnt after looking at up close pics of the aprilia 4521. I am fairly sure i have this tailight in question...

Joe

[ajleone]

Here are some pics - I searched this like for quite some time before I found it. Rediculus prices - one went for $360 on ebay eariler this year !

It is actually a CEV 9179 tail light (I think the lens part number is 5749 ) - also used on the early 4-speed scramblers.
Tony

[joe46ho]

I guess the one i have is an aprilia, but in searching for pics, i have seen some with a clear lower lens to illuminate the license plate, mine has no lense, and a spot for a toggle switch, i found a pic of one side by side... anyone know what this was used on ? Maybe later (early) Diana or scramblers ? Mine is like the one on the left in the picture...

Joe

[ajleone]

The Aprilia tail light with the toggle switch was used for the early 250 scramblers, which did not have any battery. The switch is an emergency switch in case the tail light bulb goes the switch can be thown and it ground the ignition charing coil. I explain it well, the wiring diagram show is better.

Joe - are the letters "N" and "E" embossed on the light case " It stands for Normal and Emergency - I have seen this on the Mach 1 CEV tail light bracket and was wondering if the Aprilia tial light had the same embossing.
Tony

[DewCatTea-Bob]

The Aprilia tail light with the toggle switch was used for the early 250 scramblers, which did not have any battery. The switch is an emergency switch in case the tail light bulb goes the switch can be thown and it ground the ignition charing coil.

____ Actually the toggle-switch was for shorting-out the BRAKE-light (for reason given), on 1963-65 Scrambler & Mark-III and 1966-67 Mark-3 models, only !
The "early" 250 Diana Mark-III & Motocross -(SCR) models (which were 4-speeders made before 1963), employed the fender-mounted taillight (without brake-light), as seen in your -(Tony's) post with the two pix of it.
Those simple taillight-bodies (mounted directly to the fender, without any bracket), never included any toggle-switch, since those 'early' batteryless n-c models were never intended to be street-going motorcycles (and therefore didn't include ANY means for a brake-light).
The lower-pic which seems to show a hole (in the body-shell) suitable for a toggle-switch installation, leads me to think that that particular shell was intended for possible use on a later model expected to have a brake-light setup.


DUCATIly,
-Bob