My bike is #130. I put money down on it in November of 1990 and it wasn't delivered until spring of '91. Where are you getting the manufacturing date from for your bike? I have vague memories there's something stamped on the black tag on the frame, but I'm not near my bike right now so I can't check.

A 6/89 build date seems strange... I'd guess the number you are looking at as a build date is for a component on the bike, not the bike itself? It's been a while since I've dealt with bike VINs, but if the website I just checked is correct, the 10th digit in the VIN is the model year. I suspect the 10th digit in your bike's VIN is an M (for 1991) which would rule out a manufacturing date of 1989.

Also, if I've heard it correctly, Ducati begins building the next year's bikes after the factory shutdown, which occurs in July I think? So the '91s would have begun production around August of '90 at the earliest. A build date of 6/89 would put it before the '89 shut down - in with the 1989 model year bikes. I realize yours is titled as a '90, but I don't place much stock in the date on the title. My late '74 750 is listed as a '73 on the title, and I've heard of numerous mistakes on other vehicles.

In any case the VIN will tell model year - and realize a "1991" 907 could have been built anywhere between January 1 of 1990 and December 31 of 1991. (But no earlier or later - there are regulations covering this). Model year vs calendar year can get confusing. I know it's said there was one 907 built in '89. I'm guessing that was a pilot build or something, and it almost certainly used some unique pre-production parts so it would be easily identifiable.

While there were reportedly 1000+ 907s built in '90, it's my understanding they were all 1991 models. There never was a 1990 907ie that I know of... 1990 model year was the 906. Check your VIN - the 10th digit (which is a letter) should reveal all. K = 1989, L = 1990, M = 1991.

Here is my VIN for the sake of argument. ZDM1JB4L0L B000224. If I remember L is Denotation of 90 model year. And the 6/89 is on the sticker on the frame next to the rear tire. So does that mean they prepped the frame in 89?
So am I to assume that 000224 is the sequence number for the whole model run, not for the model year?

Well then, so much for my ideas!

Yeah, the L would indicate it's a 1990 model. I'm just guessing here, but with a build date of 1989, and a serial number of 224... I'd think it was a 906, not 907...

I'll check the VIN on mine when I get home. I think digits 4-8 describe the model but I'll have to look into it more. Or maybe someone with a 906 can look at their VIN and see how it compares?

Forgive my next few questions, but... your bike does have 17" wheels, fuel injection, and 851 style (non-eccentric) chain adjusters, right???

EDIT: I checked my 907's VIN, digits 4-8 are different (I've got 1MB4P) but I haven't been able to confirm that describes the model. And yes, as I understand it, the serial number runs through the model history - either that or they built over 17,000 900SS's in 1995.

Alright, one last shot at this. My 907 owner's manual states that the two digits following "ZDM" are the model designators. So 1M is the model on my VIN.

But one thing I noticed - the sticker on the right side of the frame that has the build date - does it list the wheel size too? Mine does...

If it's a 907 it should list a 17" wheel. The 906 came with a 16" wheel.