s4r engine swap?

[mason95]

OK here's my situation: I have an 03 m620 and want to do an engine swap.
I have searched for hours upon hours for info on squeezing a 2005 s4r engine into a m620 frame and only found one thread on the old board that started about 3/4 of the way through the project and all pictures were gone.

I've tried the ducati.com manuals and realize that there are many extra bits that will be needed but I would like to hear from anyone with experience on these motors.
my questions:
What swingarms will fit?
Will I have to modify the frame for the case/swingarm pivot?
Will my wiring harness work with this?  Doesn't seem likely but the 03 m620 wiring harness will work for a 800 swap right?
Or will I have to find an s4r harness complete with gauges, keys, card, and all?
Here are some pics of what I am thinking of buying:





In your opinion Is this a worthy winter project and do you think I'll be able to find all of the parts to make everything work right?

Also, any threads you can recall or helpful links for any info on this would be much appreciated.

I know it would be so much easier to just get a 900 or 800 but I want to keep fuel injection and I want the dry clutch.........plus a butload of power.

thanks in advance
flame on

[mmakay]

What's your motivation? 

If you want to say, with pride, "I did it!" then it doesn't really matter how hard it will be.  The challenge and accomplishment will be enough reward. 

If you are trying to save some money, then you are crazy to even try.  Sell the 620, buy a S4R and call it a day.  This project will be a money pit by comparison.  And that's if you don't upgrade the brakes, suspension and everything else to S4R specs...

[mason95]

All good points Mickey.

I do really look forward to spending time on a large winterlong project and enjoy creating and tinkering in general.
As for the cost, well your right but it'll be spread over a larger period of time and if I just went out and bought an s4r I would undoubtedly be more mods and tweaks costing more money. So I guess they're all money pits in a way.
This way I'll be able to build it how I want it from the start.

I just want to find out as much as possible before I jump on this motor.
Hey, and maybe this one isn't the way to go. I'm certainly open to suggestions. But I'm pretty convinced I want to do a swap.

[Popeye the Sailor]

What's your motivation? 

If you want to say, with pride, "I did it!" then it doesn't really matter how hard it will be.  The challenge and accomplishment will be enough reward. 

If you are trying to save some money, then you are crazy to even try.  Sell the 620, buy a S4R and call it a day.  This project will be a money pit by comparison.  And that's if you don't upgrade the brakes, suspension and everything else to S4R specs...

If you want a project, why not pick up an S4R frame and go form there?

You'll soon find most of the things on the 620 were never designed for the sort of power. Your brakes, suspension will all be inadequate. You're going to have a large number of problems, assuming you get it to work. Have you ever taken on a project like this before?


And I can't express how much of a money pit this will be. Modded bikes are never worth remotely close to what you put into them. For example, take a look at the infamous SS2R Stu built. Absolutely beautiful bike. Apparently built for over 30k.

Listed on ebay for 15K starting. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&sspagename=ADME%3AL%3ALCA%3AUS%3A31&viewitem=&item=260290659295

No bids, not sold.
Then relisted for 10k starting.
http://cgi.ebay.com/ebaymotors/Ducati-Monster_W0QQcmdZViewItemQQ_trkparmsZ39Q3a1Q7c66Q3a2Q7c65Q3a13Q7c240Q3a1309QQ_trksidZp3286Q2ec0Q2em14QQhashZitem260296922702QQitemZ260296922702

No bids. Not sold. This will be a money pit. IMO, not worth it.

[DrDesmo]

The bottom has fallen out of the luxury toys / expensive doodads market, you can get an S4R for about 6-7 grand and sell your 620 for about 3-3500. 

Aside from the engine, there are many, many components that are vastly superior on the S4R over the 620.  I really wouldn't bother, personally.

Innocent, well-minded winter projects rarely end up being inexpensive or fun.

Adam

[herm]

i have very little to add, except that the gas tanks are different underneath (if i recall correctly)
probably end up with nothing left of the 620 but the seat

[Rameses]

Just to name the things you'll need that I can think of off the top of my head...

An S4R ecu, gauge, key set...

An S4R wiring harness...

An S4/S4R gas tank...

An S4/S4R battery box...

A radiator...

edit: oh yeah, throttle bodies too...


Look up the prices on those and then decide if you really want to take on this project.


(That is the ultra-rare left-side clutch and timing belt desmoquattro though...)

[Oldfisti]

(That is the ultra-rare left-side clutch and timing belt desmoquattro though...)

[TAftonomos]

Deals are out there if you look and are patient.

I picked up a 2007 team usa motor/wiring/ecu/guages for my 999 for $2K shipped to my door.  COMPLETE.

You have to ask yourself, can you do all the work/labor?  If you can, I say go for it.  If you're going to be paying "ducati shop labor rates", I wouldn't even think about it.

[Raux]

why not spend the money on the bike  you have now.

modify the stock engine with a big bore kit, stroke it. new cams, lightweight fly wheel etc...

lighten it, carbon fiber everything... see if you can get down to 300lbs as a challange.

seriously you could make a hell of a 620. make the 620 an even faster bike. cause from what i read here the 620 is the fastest Duc!

i would rather see that done than tear apart a good bike to make something that is already done. an S4R.

[DarkStaR]

A more reasonable/easy/cheaper swap would be a 800-900-1000cc 2v air-cooled motor.

[Raux]

A more reasonable/easy/cheaper swap would be a 800-900-1000cc 2v air-cooled motor.

i think only the 800 would be the same motor right. cause the 620 is a destroke 800 right?

but the rep of a 620 that is the fastest 620 out there would be killer.

[herm]

Just to name the things you'll need that I can think of off the top of my head...

An S4R ecu, gauge, key set...

An S4R wiring harness...

An S4/S4R gas tank...

An S4/S4R battery box...

A radiator...

edit: oh yeah, throttle bodies too...


Look up the prices on those and then decide if you really want to take on this project.


(That is the ultra-rare left-side clutch and timing belt desmoquattro though...)

yes, complete with the also rare reversed letters on the engine case 





edit:  maybe spend the money on a digital camera?

[Roscoe]

I started asking something similar. http://ducatimonsterforum.org/index.php?topic=13295.0
Yea, I'm talking about a 748/853, but the concept is similar, 4V motor in a Monster. A lot of valid info is discussed on the compatibility of various parts.
Those that are saying you should just sell and buy an S4 are probably right, if you simply want more bike. But if you're looking for something to keep you busy over the winter, then I say why not. The S4 motor will fit, with a lot of work.

[Raux]

oh come on. make a MONSTER 620 motor!

i vote no S4R motor.
ooo oooo ooo add a poll to this.
620 big bore/stroker with cams etc
4V engine swap
2V engine swap

dont add boobies cause you wont get any other votes.