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Hi Fellow Ducati tragics.

I think I an in luck for 1 of the 3 main missing parts for my 1957/8 bevel drive 125.

a Connecting rod assembly (connecting rod, big end, bearing & shims).

The original rod is "slightly twisted & a little bent" as my father put it on our original inspection

Can anyone that has access to an early 125/160 parts book confirm this is the unit part number

PART 0251-47-350

Really important as it is the only unit I have seen in 2 years

Many thanks
Wayne

Wayne,
I don't have a 125 parts manual, but the 160 parts manual doesn't list the connecting rod separately from the crankshaft, just the entire assembly.
I have a 125 price book, it shows a part # 0251.47.270 for a Biella, which I think is the connecting rod, no listing for your part number.
At one time it was a common practice to straighten a bent or twisted rod- I've seen mechanics clamp the big end of the rod in a vice, insert a rod through the wrist pin bushing, and twist the rod back into shape- an arbor press may be enough to push out a lengthwise bend.
If the big end bore and the small end bore were slightly out from being in the same plane, the piston would still go up and down the cylinder- I guess you'd need to worry about valve pockets on the piston crown if it was badly twisted. Even a small bend along the length shouldn't be more than the wrist pin couldn't compensate for. I'd want to know what caused a rod to twist before putting it back together. You could do a dye penetrant test if you're worried about stress fractures after cranking on it.
Rick


Edit: Found a Youtube video- it looks crude, but might work for you.
https://www.youtube.com/watch?v=EisGc4IuYMg

Thanks Rick
It's a pain trying to convert to english
I cant find the number anywhere either.

Would you know if there was a 160 push rod engine? I know that the US got different engines,

Wayne

Hi Wayne

EBay Spain seller guzman175 sells 125/ 160 rodsets

item nr 151724795624

Eldert

Thanks Elbert
I had a look.
That appears to be off a very different machine than mine

Wayne

I just emailed you all the books I have on the 160 in PDF format. They may be pushing the size limit for email servers. Let me know if you don't get them.

Author Tom Bailey (http://www.motyeliab.com) is a hard core 160 enthusiast and he may be able to help you. I will send you his email in a PM so as to respect his privacy.


Jim