Ducati 250 Desmo Rebuild
- Thread starter ebbo
- Start date
I’ve made up a new throttle cable (choke cable also needed) from a Venhill CC-20300 cable kit as you can’t seem to buy an off-the-peg cable for this bike. The old cable was frayed and rusty at the carb end and for the life of me I don’t know how it ever fitted or worked 
This is a temporary nipple fitted to the cable at the twist grip end so I can adjust it's position. There's very little adjustment available and that's on the carb top, I could add another inline adjuster at the twist grip end but this will keep it clean looking
It's been trimmed down here for a final test, you can see a bit of the old cable above
This is a temporary nipple fitted to the cable at the twist grip end so I can adjust it's position. There's very little adjustment available and that's on the carb top, I could add another inline adjuster at the twist grip end but this will keep it clean looking
It's been trimmed down here for a final test, you can see a bit of the old cable above
Attachments
Lots of clean heat seems to be the secret to success, It takes around 10 mins to heat up this iron, once it's good and hot you can turn the blowlamp off and solder in peace
The nipple is soldered to the iron to help heat transfer over, any excess solder is wiped of with a clean cloth after soldering is done.
Wifey did the video, she did a good job because she changed the angle to get a better view. The original is much sharper, youtube have thrown away half the pixels
<iframe width="560" height="315" src="https://www.youtube.com/embed/nQXi8lbiTtI" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
The nipple is soldered to the iron to help heat transfer over, any excess solder is wiped of with a clean cloth after soldering is done.
Wifey did the video, she did a good job because she changed the angle to get a better view. The original is much sharper, youtube have thrown away half the pixels
<iframe width="560" height="315" src="https://www.youtube.com/embed/nQXi8lbiTtI" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
It's square slide Dellorto Carb, the cable runs outside the return spring. The other pictures show the cable run
Just a note about the Venhill cable, the new inner is super flexible compared to the old one which is very stiff in comparison, definitely a big improvement
Just a note about the Venhill cable, the new inner is super flexible compared to the old one which is very stiff in comparison, definitely a big improvement
Attachments
Video of the throttle operation (you can just see the slide going up and down), I’m happy with it
<iframe width="560" height="315" src="https://www.youtube.com/embed/b9pkTdQBZ18?rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/b9pkTdQBZ18?rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
Lovely update Ebbo 
.... glad to see it coming together
Kimbo
.... glad to see it coming togetherKimbo
Wifey did the video, she did a good job because she changed the angle to get a better view. The original is much sharper, youtube have thrown away half the pixels
"Wifey" and "nipple" will do wonders for your Youtube channel ratings - I wonder what all the sad bastards will make of your videos though!
"Keep it up!" is what I say!
Simon
Looking good. It looks like you haven't got far to go now. Is there much left to do?
Sent from my SM-G925F using Tapatalk
Sent from my SM-G925F using Tapatalk
Not a lot Paradiso, cables to finish, fuel tank to clean out and fit, rewire, exhaust to fit, seat still to be collected when it's done, various other little odds n ends
Get it registered
This project was one year old at Christmas
Is the gear selector box ok? They can be a problem if the 2 bronze bushings in the case wear. One year is pretty impressive given the work involved, the problems, hold ups and delays. Anyway, crack on and post a video when you get it started. I sold my Mk III 250 Desmo look alike in the summer (the one you saw on Ebay).
Sent from my SM-G925F using Tapatalk
Sent from my SM-G925F using Tapatalk
I've had the gear selector box apart and can't see any wear in it, it's a bazaar device, gear selector mechanism external to the gearbox. I remember your bike, mines the same colour now
Btw, choke cable made up and fitted this afternoon. I've left the cable quite slack to be sure it closes fully every time.
Deleted account 211025001
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It's starting to look like a bike again
I'm really enjoying reading about your build and appreciate you taking the trouble to document it and post on here
Andres
I'm really enjoying reading about your build and appreciate you taking the trouble to document it and post on here
Andres
It's starting to look like a bike again
I'm really enjoying reading about your build and appreciate you taking the trouble to document it and post on here
Andres
It'll transform into a butterfly when the painted parts go on lol
It's starting to look like a bike again
I'm really enjoying reading about your build and appreciate you taking the trouble to document it and post on here
Andres
Oooohh,took the words right out of my mouth Andres
ebbo, re the exhaust (looks great by the way). Is it NOS/pattern or were you able to refurb' the original?
The only silencer I got with the bike was an aftermarket megaphone (maybe a Dunstall) that was new and unused but deeply rusted from damp storage. The new one is pattern but nicely marked ‘Silentium’ and as far as I can tell correct for the bike. It weighs a ton. The front pipe is the best of the two I got with the bike, it was rusted and in a couple of places the chrome has come off right down to bare metal but it has mostly cleaned up quite nicely.
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