1990 750 Sport

[yellerduck]

Hey everyone just joined up with you guys. Soo glad to see that there is forum for our model. Actually, mine is not a Paso but I am under the impression that it is the same motor.

I have a few questions for anyone who can comment. I am restoring my bike and am mounting the engine back in the frame. I have two 3 mm spacers that I am not sure which side of the motor they go on as I didn't make notes when I disassembled it. Should they go on the left or right side of the motor?

Is it true that these motors make more HP than the modern 750 two valve. Ian Fallons book states that it is around 73 hp and the modern 750 is something like 63 but I think that is Ducati's claims.

Thanks!

[delagem]

Well, you might look on the parts microfiche and see if they show shims or spacers, and which side. On my 900ss, I had no shims on the motor, but on the swingarm, I had shims on both sides, thicker on the left. The parts counter guy at your local dealer can look this up for you.

If all else fails, put the motor in and then check your sprocket alignment, if it's way off, switch the spacers to the other side.

[yellerduck]

True enough! I was told by others that the spacers are there because the frame is the same for the 900 motor. Any idea of what kind of shock I can replace mine with? Will a modern ss shock work? Mine is busted.

[ducinthebay]

The spacers go on the right hand side of the frame. The frame you have is the same as the 1990 900SS sold in Europe only for one year only, as well as the US 750. It was designed for the newer 6 speed motor, which was a bit wider and was made for a 180 rear tire. If you have the spacers, that means you can put in a new version of the SS/Monster motor into that frame. The spacers are also there to help with the chainline. The Paso had an outrageous front sprocket to get the chainline past the fat tire (for the day) and the Pantah motor didn't allow for it. The Sport sprocket has a slightly different offset. Check your chainline!

Good luck,

Phil
1990 Sport

[yellerduck]

Thanks Phil. Any idea where I can get a clutch pack for my bike?

[ducapaso]

About the power I can tell you that is true!
me Some monster 750 owner told me that paso is powerful, it feels just like a 900 engine!
I think it's because of the weber carburetor, that's harder to tune but very satisfacting in ride!

[persempre907]

It's so.
I've bought my 907 from a very special seller, Ludovico Pasolini, brother of Renzo, who has his workshop in Rimini.
He told me that the old engines have more power than the new ones because of bigger valves, the exhaust systems, a richer carburation and because they haven't all it needs for the pollution reduction.

Yellerduck,
as you could see in the 907 section of the forum, the 907 has 73/74 hp.
So, the 750 would have less power.
Ciao

[ducinthebay]

The cheap/good option for a shock is to get a stock one off of a later model SS, which is a bit longer than the earlier models, and the same length as the stock Sport shock. I forgot the measurements right now, but I think the longer one is 13" eye to eye. The shorter one will fit, but you will loose some ground clearance, which the Sport can not well afford, and it will also slow the steering, which it also won't benefit from. Of course you can go aftermarket, which have adjustable length, along with everything else adjustable. I found a Fox for mine, although they don't make shocks anymore, and it works just dandy. Basically, if it fits the SS series, it will fit your bike, and the spring rates and such should be very similar.

The clutch pack should be same as the Paso, and also Pantah. Barnett is always a good option.

Phil
90 Sport

[yellerduck]

I looked at the Barnett clutch application and they don't specify whether a modern ss clutch pack will work for the Paso. Do you know? Thanks.

[ducinthebay]

A new site and forum just opened for the Sport Classics, and they were kind enough to have a tab in the forums for the 2nd generation Sport, 1989 -1991 750 and 900. So all you Sport owner can now migrated over for a good solid fix of info on one of the rare ducks of the modern era.
http://www.sport-classic.net/forum/viewforum.php?f=12

Hope to see you all there.

Cheers,

[Finnpaso]

I think most of that power difference between Paso 750 engine and newer 750ss/Monster engine is coming from totally defferent cams... I have listened some Ducati engine "gurus"