What all is necessary to install a 944 big bore kit?

[ajohnsto]

Hello, I have a 2000 M900 and am looking at adding more performance, I currently have termignoni slip ons and a power commander, the last dyno run I was at 79hp and 56ft-lbs.  I have ordered a tpo beast intake and am also thinking about purchasing the 944 kit from ca-cycleworks.  My question is what all would be required besides the pistons / rings and getting the cylinders rebored?  I know new gaskets would need to be purchased but is that everything?

Also what type of power numbers would a 944 put out?  I am guessing it would cost roughly $1000 to get it done.

Thanks for the help in advance

[toodlepip]

 


This is close to what I am wanting to do to my 99M 900, cept no power commander for me as my bike has carbs.  So thank you for posting this thread as I am wanting /needing the same info!!!!!

[Blue]

Hello, I have a 2000 M900 and am looking at adding more performance, I currently have termignoni slip ons and a power commander, the last dyno run I was at 79hp and 56ft-lbs.  I have ordered a tpo beast intake and am also thinking about purchasing the 944 kit from ca-cycleworks.  My question is what all would be required besides the pistons / rings and getting the cylinders rebored?  I know new gaskets would need to be purchased but is that everything?

Also what type of power numbers would a 944 put out?  I am guessing it would cost roughly $1000 to get it done.

Thanks for the help in advance

This too has crossed my mind 11ty billion times.  I am interested to hear what those with injected monsters have to say about the 944 kit.  I believe "Drunken Monkey" has a kit installed and "Markus" has a 966 kit in his.  Hopefully they will chime in.

[Cloner]

Pistons, rings, wrist pins, wrist pin retaining clips, bored and plated cylinders (they're Nikasil plated), gasket set (order a top end kit with base gaskets rather than individual pieces....it's MUCH less expensive....and you can replace the valve stem seals, too!).  No balancing required.

There are several places where you can check potential gains (I like Brad Black's site, personally), but I believe the biggest gain is actually from the change in compression ratio rather than the gain in displacement.  I'm running 11.5:1, but that's at high altitude (my house is at 5400 feet) where it'll run on premium pump gas.  You should expect a 8-10% gain, at a minimum, across the entire rev range!

Be sure to differentiate between the intake and exhaust valve pockets milled into the piston crowns.  They look similar, but if you install one or both pistons backward there will be an interference problem.

Return on investment is poor.  Trade for a modern four valver if you really want power.

Return on investment is better for drop in high compression pistons without the overbore.  JE pistons are less than $300 on ebay which means the entire project is less than $400 including gaskets!  Power gains I've seen are 7 to 10 hp at peak and more than 5 across the rev range, but an incredible 10 lb*ft of torque across a large portion of the rev range!  My carbie SS feel much better according to my highly calibrated butt-dyno.  It also has FCR carbs, open airbox, and a full exhaust.  See http://www.bikeboy.org/900ssiehicomppistons.html for reference.

Good luck with your project!

Cloner
ABQ, NM

[greenmonster]

+1 on all cloner said, except power gains, +4-5 hp allover more realistic f hicomps only.
http://www.bikeboy.org/900carbhighcomp.html  more realistic, link above had porting, valves etc.
New map w different ignition timing must also be included in necessary mods if hicomps.

[Blue]

Back from the dead...

Good deal or not?

Complete 944 kit with pistons and jugs, ready to go for $800.

Ducati 900ss 900 Super Sport 944cc 94mm Big Bore Kit Cylinders 11.5:1 JE Pistons

If you are looking for a new top end for your Ducati 900ss look no further.  This 94mm 944cc big bore kit will do the trick.  The cylinders in this auction have been stripped and bored, then sand blasted clean, nikasiled, and diamond honed by Millennium Technologies. The pistons are two 93.94mm (+2mm) 11.5:1 JE pistons.  The forged pistons include the rings, pins, and clips, and will run on pump gas.  The pistons are matched with the cylinders when they are sent to plating so they are a perfect set, and the ring gap will be pre-set. 

[Yellow Meanie]

Back from the dead...

Good deal or not?

Complete 944 kit with pistons and jugs, ready to go for $800.

Ducati 900ss 900 Super Sport 944cc 94mm Big Bore Kit Cylinders 11.5:1 JE Pistons


If you are looking for a new top end for your Ducati 900ss look no further.  This 94mm 944cc big bore kit will do the trick.  The cylinders in this auction have been stripped and bored, then sand blasted clean, nikasiled, and diamond honed by Millennium Technologies. The pistons are two 93.94mm (+2mm) 11.5:1 JE pistons.  The forged pistons include the rings, pins, and clips, and will run on pump gas.  The pistons are matched with the cylinders when they are sent to plating so they are a perfect set, and the ring gap will be pre-set. 

Has anyone had any experience with the work from these guys?

[Speeddog]

Has anyone had any experience with the work from these guys?

Well, I don't know what the deal is, but those pistons aren't remotely appropriate for a 900 Duc motor.



They're really nice looking pistons, don't get me wrong.
But there's no 5-valve Ducati motors on this planet.

[Yellow Meanie]

Yeah, I did think they looked a little strange. I think they've just used the photo of the 13.5:1 Wossner pistons.

If you read the listing, you'll see they use the 11.5:1 JE pistons 

[krista]

IMHO, if it ain't broke, don't fix it. You'll get detonation and have to run the most expensive gas, too. And the power gains are subtle, maybe 20 feet in a 3rd gear roll on drag against someone else. I recall when I did it to my 900ss, it changed my bike from a dead match to the Honda CBR600F2 to something closer to a Kawi ZX6D.

[MotoPsycho]

For that kind of money, I'd look into suspension. Exploit the power of a Duc in a corner, jap bikes will leave you on a straight every time. Or maybe a M1000 motor. Cheaper in the long run because you still get the displacement benefit from a basically stock engine. So no detonation or having trouble starting due to hi comps or cooling issues from thinner cylinder walls.

[FrankenDuc]

Gotta agree with Grubby here - suspension first and foremost, chassis geometry is where our Ducs shine and suspension work brings out the best in them...
Then again I prefer tight canyon roads to straight highways, maybe my priorities are askew.

[MotoPsycho]

I know I was ready to pull the pin on a FBF 786 kit for my 750 but it was suggested from a friend to get leathers and a few track days instead. Glad I did.

[Yellow Meanie]

Maybe you blokes misunderstood me. I didn't ask "should I buy this kit?"... 

I have no desire to compare my Monster to a Jap bike, handling, speed or otherwise...

I just want a bit more grunt, and would probably get more enjoyment from the project itself, rather then the improvement in power.

The bike will be totally stripped down for a respray anyway, as well as some other engine modifications. 


So if anyone else has an experience with a 944 kit in an injected Monster, I'd love to hear about it.
I'd also like to know if anyone has had any work done by that particular workshop.

[brad black]

generally, the cylinders offered by places as change over are for the 90 - 97 motors with the external oil returns.  the 98 on motors are different, so you need to clarify that.  and probably send them your cylinders and wait for them to be bored.  ca cycleworks can handle all that.

bruce meyers has some 94.5mm pistons that give 954cc.  he's doing some cylinders for me at the moment to send me a kit over.

tuning will also be required.  reflashing the ecu or pc3.

otherwise not much to know.  only gaskets needed are base gaskets, you can reuse the originals with a silicone style sealer.  don't use a hardening sealer.  new O-rings too, 938232037 x 1, 88641181a x 2, 88641211a x 3.