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 Project Hypermotard

Project Ducati Hypermotard Part 2

By Jeff Naeyaert

To read part one click here!

When we last left off, we had installed a few Ducati Performance parts on Project Hypermotard, an exhaust system and some carbon bits which gave us some more power and shed some weight. Project Hypermotard is a commuter bike and a short road trip machine; we are using Ducati performance parts because we want to retain our all inclusive 2 year factory warranty.  As we explained in our last installment, Ducati, like Toyota's TRD, Mazda's Mazdaspeed and Nissan's Nismo, has its own high performance division: Ducati Performance. Ducati Performance parts are really cool and do not affect the factory warranty.  Another advantage to using factory parts is that you can finance the parts at the time of purchase.

Ducati Performance Cams
Due to the complexity of the Desmo valve train, we decided to stick with the factory engineered cams.  The Ducati Performance cam on the right has visibly more radical lobes with more overlap, lift and duration than the stock part on the left.

The Hypermotard's air cooled 1100cc L twin was plenty torquey, especially with the pipe and ECU mods we last installed but we wanted a little more breathing room on top to help keep up with superbikes.  In stock trim our bike pumped out 78 whp and 65 lb ft of torque on a Dynojet wheel dyno.  If this was a Superbike, that would be considered pretty weak but of course on the Hypermotard, the air cooled engine's simplicity, broad powerband and light weight were valued over sheer power.  Performance wise, the Hypermotard being much lighter than your average sports bike still has sparkling performance, at least at lower speeds.

AMS cam install
Due to tight packaging we have often found bikes to be harder to work on than cars!  We also didn't feel like learning the particulars of how to adjust a desmo valvetrain so we had the pros at AMS handle the install.  Look at the extent that our bike had to be disassembled to change the cams!

To help out in the power department, we had AMS Performance once again help us with the mechanical aspects by installing a set of Ducati Performance cams.  Since the Engine uses Ducati's famous Desmodromic valve control system where one cam lobe opens the valves and another closes them, cam design is very difficult, beyond what the aftermarket can typically come up with.  Due to the complexity of the valvetrain we made the easy decision to stick with factory engineered parts.

AMS Ducati cam install
The whole rear of the bike had to literally be removed to access the rear cylinder head to install the cam.

 

Project ducati hypermotard
You can see the Desmodromic cam lobes and rocker clearly in this picture.  These close the valves to assure no valve float.  Seems pretty complicated!

 

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Comments
alienpsp
alienpsplink
Monday, June 21, 2010 3:25 AM
nice project but wondering weather anyone in motoiq is interested in making one project KSR110
until240
until240link
Monday, June 21, 2010 6:14 AM
Pazzos are ok, but I prefer the infinite adjustability of the CRG levers. In addition, they fold upwards. But with the handguards, that wouldn't help you.

Just curious, what's your opinion on the clutch rattle? I guess it's part of the Duc mystique. Loud v-twin with open dry clutch.
Mike Kojima
Mike Kojimalink
Monday, June 21, 2010 7:10 AM
The clutch rattle is a Ducati noise, one of the bike's signatures.
Steve
Stevelink
Monday, June 21, 2010 10:49 AM
This is such a great project with selective use of great OEM bits and some nice touches for cosmetic or minor weight loss. Steering damper on a bike this light, sure can appreciate that.

If I were to go back to road bikes, I'd rather have this than 90% of the bikes with more power - light and agile, with plenty of power, very nice work!!!
Aldayo
Aldayolink
Monday, June 21, 2010 11:22 AM
i hope that "just for looks" stuff is just on this particular proyect... gotta love the work on the bike so far... to think i got uber exited when i painted my bmw thumper :(
SkullWorks
SkullWorkslink
Thursday, December 02, 2010 8:41 AM
I hope you have given up on this project after discovering you paid someone else to install your cams "with the stock valve springs" because you couldn't find them...hint Desmo doesn't use valve springs...

Lift the valve as high as you like leave it open as long as you can imagine spin it to the moon and back valves can't float Desmo uses no valve springs, THAT'S THE WHOLE POINT


Mike Kojima
Mike Kojimalink
Thursday, December 02, 2010 8:56 AM
It does have valve springs, they just don't do the main job of closing the valves.
SkullWorks
SkullWorkslink
Thursday, December 02, 2010 12:07 PM
Mike,
They are not valve springs they only exist to keep the closing rocker arm in place and are there only to take up slop in the follower.

The critical point here is that the article reads like at some point the valve springs need changed out if high lift or radical grinds are employed,

Care to argue that point?

Mike Kojima
Mike Kojimalink
Tuesday, December 28, 2010 3:31 PM
After looking at what I wrote, I agree with you, my wording was not the best. I will rewrite it to make it more concise. The Ducati valve springs are critical because the bike will be hard to start and not idle well without them.

If the lash take up part of the ramp is aggressive like many conventional mechanical solid lifter cams, the Desmo valve train will probably not be happy being potentially hard do start and not make much low rpm compression as these prings are pretty light. So the cam has to be designed by someone experienced with Desmo drivetrains, like the factory.

I guess that the springs are not like conventional valve springs because they are not coaxial on the valve stems like conventional springs.

They are critical for low rpm valve sealing though so they are valve springs. Do you know what they are actually called? Rocker arm springs?
SkullWorks
SkullWorkslink
Wednesday, December 29, 2010 12:42 PM
Mike,

The spring is only referenced as "the closing rocker arm return spring" in my '03 M620ie FSM.

No arguments on the complexities of the geometry and the understanding required to design a cam, and once designed production of said cam would be just as interesting, given the small radius required on the closing arm's peak of it's ramp during the opening of the valve. It would almost require EDM or Hard milling but there is no clearance for such.

Mike
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