EFI 2 stroke enduro bike.

[noobi]

And its not a KTM, its an Ossa







OSSA ENDURO 250i/300i
Engine
Type: 2 stroke single cylinder with Kokusan twin injector, admission by
V-Force3 reed rox and electronic exhaust valve.
Displacement: 249 cm³ (250i)
Bore: 66,4 mm (250i)
Stroke: 72 mm
Starter: Electric start- ACG Starter Generator Kokusan
Gearbox: 6-speed, removable cassette type
Primary reduction ratio: 21:51
Secondary reduction ratio: 12:48
Clutch: Hidraulic Wet 3-disc.
Ignition / Fuel System EFI Kokusan twin-injector
Chassis
Frame type: CR-MO – Two side detachable frame
Front suspension: Öhlins Up Side Down 48 mm TTX
Rear suspension: Öhlins TTX
Front suspension travel: 300 mm
Rear suspension travel: 335 mm
Brakes: Disc brakes, Brembo floating calipers
Front brake disc: Wave – 260 mm
Rear brake disc: Wave – 220 mm
Chain: 5/8 x 1/4″
Wheelbase: 1.470±10 mm
Ground clearance (unloaded): 355 mm
Seat height (unloaded): 960 mm
Tank capacity: 9,8 l (aprox) unleaded gasoline mixed with 100% synthetic
2 Stroke oil
Dry weight: 97 kg (aprox)


I don't think the cone pipe and the TTX will make it to the production model somehow.
They are working on 20 pre production models, and plan on having full production by June 2013.

[Crasherfromwayback]

Looks pretty funky!

[george formby]

That expansion chamber may cause infertility.

Neverthless, it's a 2 t so I likey.

[Jay GTI]

No real surprise it's not a KTM, Ossa already have the injected 2T trials bike and had made it known they were working on an enduro bike as well. I KTM were looking at the concept as well, but a lot of their R&D budget was wiped out by the failure of the X-Bow, so have been focusing on what they know they can sell.

Veeeeeeery interested in how it performs though!

[noobi]

That expansion chamber may cause infertility.

Neverthless, it's a 2 t so I likey.

4 stroke headers run much hotter than expansion chambers and there seems to be no issues with the backwards engine yzf450. So I think fried balls wont be a problem. Which is always a bonus.

[george formby]

4 stroke headers run much hotter than expansion chambers and there seems to be no issues with the backwards engine yzf450. So I think fried balls wont be a problem. Which is always a bonus.

I was thinking more of the ring, ding, ding vibrations with me tongue in me cheek. Certainly clever design. I'm too thick to figure out if the weight distribution will improve the handling or not though.

[Jay GTI]

I was thinking more of the ring, ding, ding vibrations with me tongue in me cheek. Certainly clever design. I'm too thick to figure out if the weight distribution will improve the handling or not though.

It is a clever design and will protect the expansion chamber nicely. I got real sick of coming back from a ride with my old RM and finding yet another dent in the pipe... of course I could have tried staying on a bit more, but then I wouldn't have been riding hard enough*







* yeah like riding hard enough had anything to do with me falling off

[motor_mayhem]

Good to see someone doing something towards it.

The talking about a DI 2 stroke enduro/mx bike has probably consumed about 3 times as much time as the development of said bike. While I am a 4T fan, I like to see them kept honest.

[ktm84mxc]

Will be interesting to see what a production bike is like, can only be a good thing R&D for 2 smokes.
All it needs is a major manufacturer to take the ideas.

[K6K]

the thing I found interesting was the twin injector setup, one in the crank and one in the cylinder (not the head like most DI).
So the crank injector would take care of the lubrication rather than the oil injectors on the DI ski doo snowmobile setup.
There would still be the usual 2T fuel loss straight through the exhaust port but you could probably still do some late fuel charging with the cylinder injector to run it with some good power.

[peadub]

I still don't think we need fuel injection on two strokes just yet People buy 2Ts because they can work on them and they're are relatively cheap to maintain The extra fuel consumption and emissions is not a concern They are after the simplicity and I can guarantee we will sell less two strokes when they are FI
I had to retreive two bikes after last weeks Belray Both four strokes with fuel injection failure!

[Pornstar]

could be an OSSAume bike, or concept.

[NordieBoy]

Check out the right hand side of the swingarm...

[barty5]

Check out the right hand side of the swingarm...

Take it your talking about the pivot point being off the linkage? Odd set up.

[SMOKEU]

Are EFI 2 smokers generally less prone to seizing than carbied 2 strokes?