M900 engine change.

[DucM900]

Hello everyone, I'm restoring an m900 and was interested in doing something different with the engine (it's out ). Would it be possible to put a st2 944 in ?

[Dukedesmo]

ST2 engine is the same basic 'block', just got a 2mm bigger bore, water cooling and fuel injection, so you'd need to mount a radiator and modify the electrics for fuel injection.

Not too difficult to do, or you could mix 'n match engine parts; use the 944cc cylinders & pistons plus the ST2 cams in the 900 engine for a 944cc Monster without a radiator for a more classic Monster look.

[Luddite]

Another member was thinking of fitting ST2 barrels on this thread. http://www.ukmonster.co.uk/monster/showthread.php?t=54630

I don't know if he actually carried out the mod though.

[Yorkie]

Duc,

I can confirm with a bit of work that an ST2 engine will fit in a Monster 600/750/900 frame.

Here is my conversation so far:

http://www.ukmonster.co.uk/monster/showthread.php?t=50126

Hope it helps.

Yorkie

[DucM900]

Hi guys,
Thanks for the advice does the st2 need to fuel injection or could it be run with the carbs from the monster?

Duc

[Dukedesmo]

No reason you couldn't use carbs, probably best to fit FCRs if you're going to the trouble.

You'll need to either fit Monster style pickups for the ignition or use a different ignition setup if keeping the ST2 pickup - either way an Ignitech ignition module would be a good idea.

[DucM900]

Thanks Dukedesmo,

You have given me some ideas. I'm looking for more power but dont want to lose reliability lol.

Duc

[Dukedesmo]

Not sure how much more power a standard ST2 makes? but boring the M900 to 944cc (+2mm) and fitting hi-comp pistons & FCRs will give a noticeable increase without losing much if any reliability and having to modify too many other things.

This is basically what I did (with the addition of a few other engine mods) and my bike has a really big punch from low down.

[Yorkie]

Some info here:

http://www.bikeboy.org/st2hicomp.html

And here on Ducati Up North (you might have to register):

http://www.ducati-upnorth.com/forum/showthread.php?17707-ST2-Pistons-Barrels-to-900SS

Yorkie