DUCATI DESMOTO

Were going all in with Titanium right? Atleast to some degree. Got these amazing Titanium frame bolts from Kbike. 111 grams against OEM 227 grams! 

Finally the engine is in the frame! Living in my living room for now. Seeing it everyday helps me form the lines in my head I actually want for the bike.

Now working on ground clearance, seat height and the front fork angle. Im not a tall guy so I can’t go crazy with the seat height but I do want allot of ground clearance for it to be a real Supermoto. Pictures showing the bike it is way to high..

A Hypermotard has a front fork angle of 65 degrees. I would like to go a small bit steeper to 66 degrees. Even steeper isn’t doable with this frame unfortunately…

Another issue i came across was that the swingarm axle somehow didnt match the frame holes. I milled out the holes a small bit to make the axle fit.

Custom length stainless Hell brake lines <3! Feeding the cylinder heads with oil.

I dont want the oil pressure switch to be visible from the side of the bike and also the cylinder heads have been converted to support external oil feed lines. The oil divider block enables all of this :)!

I mounted the oil divider block on the removable frame brace to get it mostly out of sight, feeding it with oil by running a line under the horizontal cylinder head and back up into the frame. Cant run the oil line on the right side of the bike since it will interfere with the custom pie-cut exhaust. 

From the oil divier block 2 oil lines run to the cylinder heads!

FAQ, i measured up the length of the brake lines by bending TIG filler rod to the right angles and length and measuring it after.

With the S4RS throttle body conversion installed my aluminium Radical frame (4.2kg) just would not fit. Not enough clearance around the throttle bodies and the vertical injector. This required me to fabricate a new removable cross brace.

Also grinded down the welds on the weld in bolt hole things. this way it looks like a solid piece.

FAQ
Why removable? If I would weld in a solid brace there would be a high risk of the frame twisting and or being under stress. Making it removable allows me to weld it in with no wisting force on the frame. Plus I wanted the frame to be removed from the engine more easily.

How did I bend the aluminium tubes? Fill it with sand, heat it up with a flame and bend it slow and steady. Dont go to extreme on one spot or the aluminium will just crack open. Took 3 tries, but its doable.

Engine all done! Finally! Timing set and compression ratio is on the money, 12.9:1 Just looks amazing!

Thanks to Toine for teaching me how to set the timing. Was a small challenge because of the racing cams. But all worked out!

What do you see in the pictures?
CTMoto limited clutch cover, Ducabike adjustable slipper clutch, lightweight Kbike timing pulleys, Cerakoted engine/valve covers (Glacier silver), RS replica crankcase breather + chainguard (from Dragos), lightweight exhaust flanges (from Isaac Siegl), Kbike alternator, custom Kbike camshaft covers to allow for external oil feed lines, black AN oil line fittings, every ring, nut and bolt in titanium, Ducati S4RS throttle body conversion and the is engine completely glass bead blasted to look like new.

Whats in the engine?
Pistal high compression pistons, Carrillo conrods, Lightened/balanced crankshaft, Ducati corse alternator, custom lightweight flywheel, lightweight 1098 gearbox, lightweight 1098 primary drive, 47mm intake valve (46mm OEM), extremely flowed/tuned cylinder heads (cant go bigger then this…), converted crankcase from wet to dry clutch, Kaemna Racing camshafts, lightweight Ducati corse timing gears and all titanium bolt/washer internals/externals.

Expected power output
120bhp on the rear wheel with 120nm of torque. All in a bike that will weigh around 155kg WET.

Modified 50mm Ducati S4RS throttle body’s finally done! From 46mm to 50mm.

Jesus christ i underestimated this. Took a long time to get done. Build up using 996, 1100DS and S4RS throttle body pieces. But the main bodies are from a S4RS.

Custom linking brackets to force the right angle and distance, custom TPS plate, custom throttle cable cylinder, custom valve axles. Turned down bodies to make sure they fit the intake manifolds (oops went a bit to far….). Manifolds will also need to be increased in size though. Lets just say all custom!

Combined with Ducati 1098 12 hole injectors to complete the party!! And lets not forget, everything finished off in titanium!

Picture of a original S4RS throttle body included to show how much work wen into creating this!

FAQ, why not shower injection? I dont want to run a airbox + a 2 valve high torque engine works better with injectors behind the valve to keep the high torque at low rpm’s.

Finished the exhaust manifolds from 40mm to 50.8mm (will increase exhaust gas flow). All stainless, finished off with the lightweight aluminium exhaust flanges from Speedy Siegl Racing. And titanium nuts offcourse ;).

Also finished the brackets that will support the custom aluminium subframe. Will be welding 20mm aluminium tubing to this and grinding down the welds for a seamless transition. Made out of 6082T6 aluminium

Ok still a lot of work todo…. Rake isn’t right. So the rear tie-rod needs extending (already has a custom longer insert) to increase the ride height and fix the rake. OR drop the forks through the triple trees. I’m only 1,73m so not sure yet which way I will go since it already looks pretty high…

Also the steering range is terrible… so I will be making new eccentric steering stem.

And the Ohlins ttx shock is hard as a rock. So that also will need a massive overhaul to soften it up.

For the rest it does look nice, however I really need to see the engine in the frame to check the lines and angles of the design I have in my head.

No explanation needed. Just look at this beauty! Still needs to timed out, compression/squisch measured and new belts.

I want the exhaust to run over the clitch cover and move back into the frame. While doing a frame test fit i noticed that a 50.8mm exhaust pipe will never fit or will be way to close to the frame and crank breather. This required me to mill down the vertical cylinder and head to create space. Will not really affect cooling performance, i hope…

Building the engine like it is new. Maybe even better then new ;)? Ill let the pictures describe the process. Most of the engine internals also fitted with titanium goodies. Notable mentions: Fitted a 1098 starter clutch since its lighter (wont make any difference haha), amazing Ducati Corse alternator, Ducati Corse timing gears, 1098 gearbox, lightened crankshaft, Ducabike adjustable slipper clutch and Pistal high compression pistons!

Finished the custom adaptor to mount a Ducati Corse alternator to the FTR01 air cooled 1100DS engine. Made out of 7075T6 aluminium and mounted up with titanium hex bolts!

Curious to see if this will work on a road bike, since it requires 3000/4000 rpm to actually charge the battery haha 😀

Why this alternator? Lightweight, and since it’s rotating mass it will result in a faster uprevving engine!

I got a old SuperSport flywheel and turned it down to make sure it fits my engine. Original flywheel weighs 1.8kg and this custom one now only weighs 1.1kg. I can go lighter to 0.5kg with another flywheel however that wont drive nicely on the road :D.

Found 2 very slim oil coolers that will be mounted at both sides of the frame. More on that in the future.