More power in my M900 -98

[koko64]

I think it would depend on what combination of modifications go with the package.
For a stock motor maybe. I do think the FCR39s give better response at smaller/partial throttle openings, but it seems grabbing bigger handfuls of throttle on a 900 goes the way of the 41s from bikeboy's dyno charts. Getting on the gas, the 41s were softer off the bottom on a worked 900 and better in the wet than the 39s. While exiting a corner leaned over, I could give the 41s more gas without getting bitten. The 39s were too good! Getting the 41s tuned on a 900 was more involved in getting the slow circuit just right iirc.
Anyway, I was happy with both.

[Rudemouthsky]

The 39's vs the 41's is such a tight debate that for me it made no sense for me to not go with the 41's. Chris Kelley is absolutely adamant that if you ever want to get the most potential out of the 900, you need the 41's so that swayed me. I think a Sudco rep once said they sell 3- 41 kits for every 39 kit, for whatever that's worth. I began having unrelated problems shortly after my 900 swap and really barely got to experience mine. I suppose I would probably get the 39's if I were to do it again and was leaving the motor stock based on Brad Black's research.

[brad black]

heads: http://www.woundedduc.net/Engine.html  these are v heads, compare chamber to w here: http://www.ebay.com.au/itm/Piston-and-cylinder-head-horizontal-DUCATI-Monster-900-1993-1997-/161379735581?pt=AU_Motorcycle_Parts_Accessories&hash=item2592fb581d&_uhb=1

i'd go 39 because i'm a tight arse.  actually, i'd probably go mikuni these days.  the tm pro series are much cheaper.  but they're not a racked drop in.  now i'm just rambling.

[Graymonster]

Thx brad black! I'v sendt them an email about the heads

[Rudemouthsky]

heads: http://www.woundedduc.net/Engine.html  these are v heads, compare chamber to w here: http://www.ebay.com.au/itm/Piston-and-cylinder-head-horizontal-DUCATI-Monster-900-1993-1997-/161379735581?pt=AU_Motorcycle_Parts_Accessories&hash=item2592fb581d&_uhb=1

i'd go 39 because i'm a tight arse.  actually, i'd probably go mikuni these days.  the tm pro series are much cheaper.  but they're not a racked drop in.  now i'm just rambling.

Haha...those are the heads I bought from him 8 months ago, along with the matching bottom end. He hasn't updated his site in ages.

The FBF cylinders and barrels are from the same bike, I tried to buy those too.

[Graymonster]

Ohh, snap... just start searching again 

[Rudemouthsky]

Ohh, snap... just start searching again 

Those have the external oil lines so they may not have worked for you anyway.

Maybe cams and porting what you already have actually is the better way to go...

[Graymonster]

Maybe cams and porting what you already have actually is the better way to go...

I'm looking into that posibility, but which cams should I buy, and were... Would st2 cams fit? just want to expand my field of search.... No problems with the porting, have an exelent place to get that sorted.

Wiktor

[koko64]

Yes, ST2 cams fit. 

[brad black]

the external oil lines are on the cylinders, not the heads.

[koko64]

Brad. So the oil holes on the head to barrel faces line up and fit as usual? Good to know. Does this mean 900ie heads would be a bolt on as long as you fit later barrels? That could open up possibilities.

[brad black]

any 900 cams are pretty hard to find these days.

the o-ring location went from cylinder to head in the small block motors around 2002 i believe.  st2 didn't change, maybe 900 didn't change either?

98 to 01 ss had internal drain backs, monster allegedly went to air cooled cylinders in 00 according to falloon (from memory).  all just variations of the same theme.

[koko64]

Thanks Brad, good to know. Opens up the possibilities.

[Graymonster]

Again, thank you folks! Really appreciate the help you give a noob! 
I'm now looking for new cams everywere... and ccw to answere my e-mail.

[MotoPsycho]

GRUBBY: Mini tunnel ram, as in forcing air into the carbs?

Nah, as in a little bit longer intake tract. Like a few more inches. After looking at it, wouldn't work. Not enough room plus I don't have pod filters anyway. It was just a thought.