Hi all, I realise this is a subject few people will have much knowledge on but what are the possibilities for engine substitutes?

the engine that came with my bike it in a bad way internally, it was standing in it's own oil for years...

So rather than face a pretty huge bill (estimated at around £2000.00) for a complete engine rejuvenation... i thought about buying a low milage alternative and mounting that instead.

I haven't decided yet which course to follow but i think the more alternatives i have to choose from the better.

I don't consider myself a ducati purist by any stretch of the imagination so all suggestions are welcome

If you ever decide to use another engine, be careful that probably you'll have to do all the maintenance by yourself.

At least in northern Italy, usually good mechanics won't put their hands on such radical modifications, unless they did them from the beginning. I brought my modified Paso to different Ducati Services just to adjust valves and carburation, but they all refused to work on it. They say that they couldn't guarantee any work on this kind of motorbike and they prefer to refuse rather than to risk any worse problem in the future...

Personally I think it's a responsible behaviour from them, so if you plan a transplant you should be aware that you will have to spend *a lot* of time on your bike.

PS: my nickname is LCERIANI, not ICERIANI. "L" stands for "Luca" :thumbup:

I read this interesting article about ignition coils:


According to the author, "The maximum current that can flow is determined by battery voltage and what’s known as the resistance of the primary coil. This maximum current puts a limit on the strength of the magnetic field that can be created in a given coil."

So using a coil with a lower LV resistance should give a stronger spark especially at high RPM, when the high current helps charging the coil faster. The drawback is that at low RPM the coil draws more current from the battery and heats the coils and electronic switches more ("this increases the resistance in the circuit which reduces the coil current and thus ignition performance as well").

So probably Paso coil and Monster coil both work with M900 engine, but
- Monster unit should give a better performance at high RPM
- Paso unit is better at low RPM and causes less stress to battery and circuits

Again, it's a matter of tuning.
With my engine replacement I wanted to get also more performance at high RPM. So carbs jetting, filters, CDI, plugs and coils were all chosen with this objective in mind.

Bye!