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Too cold for spannering, and very quiet on the forum, I have been looking at some old Ducati rebuild pictures .
It may be of interest or not, or has it indeed been done before. ?
Fitting a late type clutch drum with integral bearings, into the early type crankcase which contained clutch carrier bearings. The original clutch drum was damaged, the retaining method of the clutch centre onto the gearbox shaft is not a great arrangement. As I wanted to retain the original cases, and had the later type drum, crank gear and gearbox shaft, I thought I would give it a try.
The original inner shaft bearing is retained and still takes the clutch release thrust load. the clutch bearing flange on the case, was reduced in length, with a counter bore to accommodate the flange on the rear of the later drum, leaving as much material as possible. A shouldered bronze sleeve carries an extra bearing which fits into the original bearing / spacer bore, with a purpose made shaft spacer between the bearings, the shaft now being supported on two bearings, the outer being in the correct position for primary gear alignment using the spacer behind the drum.
The primary gears run quiet, and the clutch operates ok, It has covered over a thousand miles to date, and all seems well.

Cold? It is freezing! I have some jobs to do in the garage, but there is no way that I'm going out there.




Colin

Certainly to cold for the shed. I would not be able to do much anyway.
Thanks to postal strikes I have a fully stripped engine and have been waiting for parts from Jesus Guzman, Spain, for four weeks and no idea when (if) I will get them.
Merry Christmas to all the members of the best Ducati Singles online forum.

Merry Christmas George, I am sure that Bill's advice would be to have a glass of single malt.



Cheers,

Colin

Aye Brian, what a lovely job that is. I just wish that I had the nouse to carry out this sort of machining. I think that I should be able to do it, but have never gone ahead and bought a bit of kit and then practised using it since leaving school. Always want to be out with the flies in the teeth!

Bit parky in the workshop and with 4" snow, but was out for a while, with the stove well charged and a large mug of "Gunfire" for inner warmth. I am trying to diagnose the ignition ills of the petulant "Morini the Minx" 125H single. Another MRC owner/sufferer has already burnt Nigel's ear in case something Ducati "might suit", but that is likely to involve machining and lots of "suck it and see", which is fine for a DIY job but not so good if you are trying to earn a crust under the current financial circumstances.

As Colin says, a wee snifter in this weather does fortify when dealing with cold workshop syndrome, on getting back into the house. As does a good homemade curry or chilli dish.

Enjoy the tropical air on Monday, with the lift in the ambient temperature and have a grand festive time, the shortest day is only 4 days away and then the light starts to return.

Good health, Bill

Certainly is far too cold to be in the workshop but I've bin out there anyway I had a new electric roller garage door fitted this past week and have spent this afternoon making and fitting a mahogany weather sill on the floor to seal everything up nicely.......bloody fingers are frozen off me and stainless steel screws have been shearing off in the cold .......happy Crimbo everyone
Cheers,
George

Yes, too cold for me too. I haven't touched my 175 re-assembly for 2 weeks, but I might do an hour or 2 later today.
I keep meaning to look at adding a radiator in the garage. I think it would be quite easy as the pipes for the hallway radiator run along the adjoining wall. A bigger job would be clearing the stuff away from said wall and then finding new homes for it.

Looking at your photos Brian, did you also make your own kickstart improvement? I bought a kit from USA to replace the forked leaf spring with a coil spring, which just involved drilling and tapping one M6 hole into the case.

I assume your motor also has the early type of bottom bevel arrangement, with bearings in it. Did you keep that?
Mine has the later type with bronze bushes.

Hi Ian, yes I did make the return spring plate, I obtained the spring from Nigel. The whole thing got a bit involved, the ratchet pinion gear teeth were badly worn, fortunately it was the type with teeth around the complete circumference, so I modified things by making a steel carrier plate which spigots into the bearing housing, then moving the lifter cam round approx 180 degrees, so the quadrant now engages with the previously unused teeth on the pinion.
I also installed a single side shielded bearing behind the ratchet, too protect it against any possible future debris from the ratchet teeth.

>> I assume your motor also has the early type bottom bevel arrangement, with bearings in it. Did you keep that?
Mine has the later type with bronze bushes.<<

I had two complete motors, one being the original from the machine, the other being a later type. I assembled the motor using the original cases, and the best components from both engines, plus new parts.
The earlier original engine having the bush arrangement, the later having the bearings. Being a relatively newcomer to Ducati singles, I used the bearing set up, as I was under the impression this was the later arrangement?
No doubt someone will be along Ian.

Similarly, I have only worked on one of these, so can only go by what my “factory workshop manual” says, as photo. Maybe they re-introduced the type with bearings?

Well Ian, that would seem to indicate the bushes to be the modification. I have just looked through Mick Walker's Ducati Singles Restoration, as far as I can see, he makes no reference to the bush type whatsoever, strange.

Bill, thanks for your comments re the clutch conversion. You don't know what you can achieve until you try, I'm sure with the right kit and a bit of practice, you would succeed.
As a good machinist friend of mine would say, make one, throw it under the bench, then make one properly . I have been there quite a few times over the years.