1123cc Big Bore Piston Kit for 1000DS

[Triple J]

So what has to be done with the fuel pump to convert an EFI bike to FCRs? I think the Monstrada could use some engine work this winter if it would work with the stock tank. 

[junior varsity]

not sure about the fuel pump, i was planning on just using a double output vacuum setup, but I hadn't gotten quite there just yet.

[Triple J]

I'm assuming you lose the fuel pump...so I'm just wondering what has to be done instead??

[MotoCreations]

So what has to be done with the fuel pump to convert an EFI bike to FCRs? I think the Monstrada could use some engine work this winter if it would work with the stock tank. 

Four options:  (FCR's like 3-3.5psi fuel pressure)

1) swap the 3-bar (45psi) pump for a 3.5psi and keep internal tank mounted
2) external mounted self-regulated 3.5psi electric fuel pump (I've done this @14 times the past 11 five years)
3) external mounted 3.5psi electric fuel pump with external fuel regulator and return line
4) One of Chris / CA-Cycleworks large volume vacuum pump kits - add an inline pressure regulator if you want (and vacuum operated fuel shutoff if you are concerned about fuel flow when the bike isn't running)

The question should be if you use the factory ignition system; retrofit early and convert to twin-DS-plug; MSD or other to fire the plugs and allow advance/retard. 

[krista]

So what has to be done with the fuel pump to convert an EFI bike to FCRs?

If gravity feed doesn't work, then get a T fitting so that the pressure output goes off the T  back to the return in the fuel tank. Then come off the T inline with the feed for the carbs. This is exactly how it is on the 900ss carb'd: automotive EFI pressure fuel pump into a Y fitting.

[TAftonomos]

I'd REALLY like to keep it as clean as possible without anything external.  Been searching for a low-pressure intank pump without any luck.
 Something like this:

would work external, just need to figure a good way to hide it.

[junior varsity]

just need to figure a good way to hide it.

duct tape

[Triple J]

Thanks Mark and Chris! 

Doesn't seem like too big of a deal...something to consider for sure. 

[Duck-Stew]

I'd REALLY like to keep it as clean as possible without anything external.  Been searching for a low-pressure intank pump without any luck.
 Something like this:

would work external, just need to figure a good way to hide it.

Those pumps used to be a quality low-cost unit that would last for a while.  Quality control has gone to sh*t with them lately and they're not the best anymore for what you're after.

I'd try a vacuum operated pump off something Japanese w/available rebuild kits (should that happen...)

[Langanobob]

Has anyone here ever had their Ducati's crankshaft balancing and lightened? 

The rod bushing that holds the wrist pin for the upper cylinder of my bike is worn.  This causes a sound when the engine is running.  The sound can be heard at idle and throughout the range of RPM, but is especially noticeable in the 4-5K range.  This wasn't a problem before, but after the bigger pistons were installed the existing wear was enough for this sound to become more prominent.    Donnie took the top end apart and inspected his work to see if there was any problem with the work he had done.  Everything looked great and there was no wear.  It took a while to find the offending problem, but now we know.  I could ignore the sound and live with it for quite a while, but I'm not going to.  To replace this bushing the bottom end must come apart. 

I'm thinking of having the crankshaft balanced and lightened while it is apart.  Does anyone have experience with this?  Was it worth the extra expense?  Did it reduce engine vibration?  Were there any negative side effects? 

The balancing sounds like a good idea to me, especially since you have new and presumably different weight pistons and have to split the cases anyway.  No FHE with balancing a Ducati motor though.

About the piston pin noise, I have a long and illustrious history of taking things apart to fix a noise, fixing what I was sure was the problem and then putting it all back together only to find the noise is still there.   Exactly how much clearance is there in the allegedly bad pin bushing?  The cylinders were bored and plated - what is the piston skirt to cylinder wall clearance?  Your engine builder should provide numbers, not just a statement that they're OK or not OK. 

Don't mean to sound like an armchair quarterback or be critical of your engine builder, it's just that noises can be very hard to diagnose.  I'm sure there are valid arguments to the contrary but IMHO he should have checked the clearance when first installing a new piston pin in a used rod bushing.

[TAftonomos]

Bumping this up, looking for educated opinions on crank work.  I'm not going to name who, but someone was trashing Ben Fox's fork that happens to own a very well known shop in the midwest.  Surprised me when he told me they wouldn't even touch it if Fox did the crank, that he has murdered a set of heads in the past, blah blah blah. 

Now, there are always 3 sides to a story, but that shop pretty much took themselves out of the building a motor equation when they unleashed the verbal lashing that they did...

I was planning on having the crank done to "SPS" style/specs, getting a set of rods fitted, and then either doing it myself (never done before) or paying someone to assemble the bottom end. 

[Raux]

try Kaemna in Germany.

http://kaemna.de/cms_en/katalog.htm?&view=seite&seite=125

[1KDS]

That probably wouldn't be cost effective

[akmnstr]

Ben Fox balanced and polished my crank.  He made it look real pretty.  Ben had ordered a set of Piston's for me too, they never came so I picked up a big bore kit from BCM and had them send Ben the Piston's.  Ben could of gotten pissed off about me no longer wanting the piston's he order but he understood I just couldn't wait forever for his piston's to arrive.  He went ahead and did the work using the BCM piston's without complaint.  I also purchase a set of corrillo rods from him.  I think the dude is okay. 

[Travman]

Ben Fox is balancing my crank right now.  Hopefully I'll see it soon.  My local dealer sends all their cranks that need balancing to him.