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Thread: Ducati 250 Desmo Rebuild

  1. #209
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    Quote Originally Posted by Micky View Post
    Good one ebbo

    We're all watching intently and with great interest

    Cheers Micky and everyone else, I've been waiting three weeks now for the painted parts to be done and two weeks for zinc bits, hopefull next week...
    Two wheels > 1974 Ducati 250 Desmo - 1974 Puch Maxi 2
    Four wheels > MX5 2.0 RF

  2. #210
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    Quote Originally Posted by ebbo View Post
    Cheers Micky and everyone else, I've been waiting three weeks now for the painted parts to be done and two weeks for zinc bits, hopefull next week...
    Yes I remember the waiting when I did my Z650 It will definitely be worth it though and I look forward to seeing the results
    Dream as if you'll live for ever. Live as if you'll die today

  3. #211
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    A new toy has come to play in the ebbo garage. How many times I wished I'd had a lathe!

    Sorry its a mess, I've been so excited over this I'm still using it on the delivery pallet it’s bolted to
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    Two wheels > 1974 Ducati 250 Desmo - 1974 Puch Maxi 2
    Four wheels > MX5 2.0 RF

  4. #212
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    First job was to make up a new shouldered pivot bolt for the master cylinder. The old one was rusty and the end of the thread was gone where I'd had to cut the old lock nut off.

    The original bolt
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    Two wheels > 1974 Ducati 250 Desmo - 1974 Puch Maxi 2
    Four wheels > MX5 2.0 RF

  5. #213
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    So construction is as simple as I could make it.
    One S/Steel M6x30mm bolt with the head skimmed off to make it look nice.
    The top washer is a thin one cut down to a diameter of 11.85mm so it sits in the alloy housing.
    The M6x15mm mild steel sleeve was the main bit turned up on the lathe, diameter I can't remember
    Thin washer on the bottom and a new M6 Nylock nut
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    Two wheels > 1974 Ducati 250 Desmo - 1974 Puch Maxi 2
    Four wheels > MX5 2.0 RF

  6. #214
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    Bolt fitted and looking very nice

    Of course, this is simplifying things, it's taken three days on and off to get this far

    And btw, this is probably the most expensive bolt since the Apollo program!
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    Two wheels > 1974 Ducati 250 Desmo - 1974 Puch Maxi 2
    Four wheels > MX5 2.0 RF

  7. #215
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    Quote Originally Posted by ebbo View Post
    Bolt fitted and looking very nice

    Of course, this is simplifying things, it's taken three days on and off to get this far

    And btw, this is probably the most expensive bolt since the Apollo program!
    But oh so worth it for the satisfaction it brings

    Andres

  8. #216
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    Quote Originally Posted by Outtomunch View Post
    But oh so worth it for the satisfaction it brings

    Andres
    I have never enjoyed myself so much for a long time

    Cheers Andres
    Two wheels > 1974 Ducati 250 Desmo - 1974 Puch Maxi 2
    Four wheels > MX5 2.0 RF

  9. #217
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    Did you have to bush the lever?

    I have made brass 'press in' headless bushes to take out the slop in levers on projects.

  10. #218
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    Quote Originally Posted by dr nosh View Post
    Did you have to bush the lever?

    I have made brass 'press in' headless bushes to take out the slop in levers on projects.
    Well done Dr, do you have a lathe?

    I didn't need to bush the brake lever, it does have a steel bush in it but I don't think its worn. (Thinking back, the bush outer dia is around 6.96mm so the wall thickness on the 6mm bolt is ermm, very thin)

    The clutch lever on the other hand does need a bush. It's straight alloy and it's worn quite oval. It doesn't seem quite so daunting to fix now
    Two wheels > 1974 Ducati 250 Desmo - 1974 Puch Maxi 2
    Four wheels > MX5 2.0 RF

  11. #219
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    I don't have a lathe in the current workshop, but it is on a long shopping list and there is space for it.

    I used to have access to lathe/mill/materials etc in a former place of work.

    A pal local to me will make my parts for me, I have to provide a sketch/drawing and material. (Retired precision eng, so happy being in his workshop).

  12. #220
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    Quote Originally Posted by dr nosh View Post
    I don't have a lathe in the current workshop, but it is on a long shopping list and there is space for it.

    I used to have access to lathe/mill/materials etc in a former place of work.

    A pal local to me will make my parts for me, I have to provide a sketch/drawing and material. (Retired precision eng, so happy being in his workshop).
    Lucky you, you’ve saved a fortune!

    What ever you do, don’t go into the RDG Tools showroom in Halifax, brand new Myford lathes made to order
    Two wheels > 1974 Ducati 250 Desmo - 1974 Puch Maxi 2
    Four wheels > MX5 2.0 RF

  13. #221
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    Quote Originally Posted by ebbo View Post
    Whatever you do, don’t go into the RDG Tools showroom in Halifax . . . . .
    Or go anywhere near the 'Chronos' website . . . . .

    https://www.chronos.ltd.uk/

    I have a 'Warco WM280V' lathe and a 'Warco GH Universal' Milling Machine. Like you I was very excited when they arrived but they are cheap Chinese and their limitations soon become apparent. I have done a lot of work with both but you have to take things very slowly with sharp tools to get a half-decent finish (sorry, but that's my experience).

    Enjoy it and (like me) treat yourself to lots of accessories .

    Bob.
    The BMW R100GS - Truly Unstoppable

  14. #222
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    Thanks for the heads up about the Chronos site...it’s just like being in a sweet shop

    Brian

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    You may say I'm a dreamer, but I'm not the only one

  15. #223
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    Quote Originally Posted by Voyager View Post
    Or go anywhere near the 'Chronos' website . . . . .

    https://www.chronos.ltd.uk/

    I have a 'Warco WM280V' lathe and a 'Warco GH Universal' Milling Machine. Like you I was very excited when they arrived but they are cheap Chinese and their limitations soon become apparent. I have done a lot of work with both but you have to take things very slowly with sharp tools to get a half-decent finish (sorry, but that's my experience).

    Enjoy it and (like me) treat yourself to lots of accessories .

    Bob.
    Compare my Warco to a new Myford and the difference is obvious, but the Warco is a lot of lathe for relatively little money so you can give the hobby a try and see if you like it.

    Daft thing I’ve found is the degree marking for cutting tapers on the top slide are behind the tool post, how your supposed read them I don’t know lol
    Two wheels > 1974 Ducati 250 Desmo - 1974 Puch Maxi 2
    Four wheels > MX5 2.0 RF

  16. #224
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    Quote Originally Posted by ebbo View Post
    Daft thing I’ve found is the degree marking for cutting tapers on the top slide are behind the tool post, how your supposed read them I don’t know lol
    .

    You'll find a few oddities like that!

    What really annoys me is that both the lathe and mill 'chatter' under any sort of load, the bearings must be rubbish. I keep meaning to strip them down and put some decent bearings in.

    I have had a 1950s 'Denford Viceroy' lathe for years and it has been a much better machine in its day (built in Halifax!). Unfortunately its now very worn and the Warco was to replace it and also to make parts for refurbing the Denford.

    I wish I'd taken a much deeper breath and bought a Bridgeport .

    Never mind, I love it really and lavish lots of care and attention on it (swapping the Change Wheels is a real pain though, allow at least an hour to change thread pitches ).

    Bob.
    The BMW R100GS - Truly Unstoppable

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