214 lbs, 70hp

[Statler]

Hopefully the video they're promising will be up soon.  I'd like to see them roll it up on the scale.    How the hell do you make something that weighs half a standard street-legal sportbike?  Half!

[Slag]

I'ts def. a paioli  with the obvious stickers... and those beautiful berringer brakes!

I thought that was just a sponsor sticker  Never occurred to me that it was the suspension manufacturer 

[Porsche Monkey]

That KTM sounds awesome.

[Roscoe]

I'm pretty skeptical of the weight as well. I've seen SM's down close to that, but with a lot of Ti and carbon, and of course no bodywork and the related mounts. The SXV in stock form tips the scales at 271lbs, so they would have to be pretty creative with the weight of that chassis to get 214lbs.

Here's the RSD bikes. I saw the black one at the IMS and it was beautiful.  [moto]
http://www.rolandsands.com/images.html

[Roscoe]

That KTM sounds awesome.

That's not a KTM, it's the SXV 550, the same motor as the road racer in the first post. I've been behind one that had  A twin GPR exhaust and it sounded like nothing I've ever heard before.

[Capo]

The engine with throttle bodies weighs 72 ib

[ducpainter]

Wanna race?   



http://thekneeslider.com/archives/2008/10/15/tss-rs500-2-cylinder-2-stroke/

[Roscoe]

I was looking at the 2008 RS250 Honda when you posted that 500. That bike sounds like a wickedly fun way to scare the poo out of yourself

The RS250r is stated as having 92ps (Hp?) with 101kg or 222lbs, and its a two smoke, so Id really like to know how they came up with 214lbs.

[Capo]

The power to weight ratio is not exceptional, it would need 90hp for that.

[fasterblkduc]

  That thing is sick! I've been thinking of building a roadrace conversion SXV for a while like the 450 Motos. It would be nice to have unlimited $$, and do what they did but since I don't, I'm thinking of doing the conversion. Change suspension, add bodywork, and go racing.
There are lots of people building the 450 Motos now and WERA has a class for them. I fell in love with those the minute I first laid my eyes on them at Laguna in '07. The only problem I have is I would like to see how the motors hold up and I would like to see the concept proven a little bit more first...especially chassis set up. The swingarm angle is awfully flat. There is a Spanish company making kits now that retail for approx. $5k that just need a donor 450MX bike. BeOn Automotive is the company and the kits look amazing.  http://www.beonautomotive.es/fotos_motos_25.html  Check out this link for photos of their bikes.
Making singles into road racers is far from a new concept. Putting singles into GP chassis has been done for a long time by lots of people. BareBones racing has done a lot of them. There is a European racing series dedicated to them. I race against a guy who has a 450 Supersingle. He put a 450 in a Honda RS125 chassis. He tweaked the motor to get somewhere around 65 HP, and this thing is wicked fast.
It will also be cool to see what the OEMs start producing on this theme. KTM is supposed to be making the RC4, and there have been several rumors of others. As stated before there is the Moriwaki Honda which has a race series for youth with big $ payouts.

Here's one pic from that website that I posted. If you like this pic, go to the website for many more.

[Capo]

The 550 engine is available $3,500

[Capo]

http://www.rsvr.net/shop/custom.asp?recid=11//

[Norm]

My dream bike is a short wheelbase monster styled bike that weighs 300-325# with a torque output of 100 ft/pds.

[pintsizejesus]

Ahhh..Aprila 550 twin. This motor sounds wicked with an open exhaust, raced with a couple in supermoto.
I think this will become more and more common. There's already an rs125 honda with a CRFx250 single. Roland Sands has been developing road racing bikes converted from current MX bikes, similar to supermoto, but different geometry, and bodywork. And it's pretty easy to make 60 to 70hp with the bigger bikes like the 550 and the KTM 560 single. Heck, even the boys with $$$ are making 60+ with a 450. My stock ktm 450 with basic bolt-ons and jetting made 50hp with 220 lbs, and would pull the front on the first 4 gears...
Change the geometry of an MX bike with shorter forks and swingarm/shock adjustment, add bodywork, including tank and seat, and you have the makings of a very capable "schoolboy" road racer that can be run by a full grown man and not just a 130lb 7th grader. (although the 130lb 7th and 10th graders i've raced against were F'ing fast)_
It would be cool to see classes that utilized this format as it would open up a door to riders with motocross experience and bikes, that don't have the dough to have a dedicated road racing bike.

Yeah it's definitely possible to make those numbers, my 250 sm is making 40 at the wheel but it's far from stock.  No idea on the weight though, its a crf250r and the site claims 204 but I'm sure that's without fluids.