motoGP - 600cc class

[Captain]

As you've probably heard, the 250 two-stroke bikes are being replaced by 600cc four-strokes in 2011. Some of the details of the regulations are emerging:


4 Stroke motors
Max capavity 600cc
Max number of cylinders: 4 - but 4, 3 and 2 will be allowed
Min motor weight: 4 cylinders 135 kg, 3 cylinders 130 kg, 2 cylinders 125 kg


Being able to run a 2 cylinder bike is seen as a major win for Aprilia, who was pushing hard for it to be allowed.

http://static.blogo.it/motoblog/maxsym_gp600_01.jpg

[RIPPERTON]

* 4 Stroke motors
* Max capacity 600cc
* Max number of cylinders: 4 - but 4, 3 and 2 will be allowed
* Min bike weight: 4 cylinders 135 kg, 3 cylinders 130 kg, 2 cylinders 125 kg


Captains pissed again he meant total bike weight.
but a real engine builder could have figured this out.
600 is too big for a start like 990 was for MotoGP. They will drop to 500 after the first year

[Stu23]

Hopefully then to 400 after another year :)

[Captain]

oops :):):)
What was I drinking last night? didn't even notice that, I did wonder why there would be a 'motor' weight, but that's as far as the brain processing went.
what an idiot.

[RIPPERTON]

all my engines finished at the NSWRRC. how bout u try finish 1 session.

captain i should have used a smiley face i spose :spank:.

K....now make them win

[wasname]

Grrr.... stupid rain

[Captain]

Wtf?

[Marcus]

I would buy a 120kg 400cc

[Mr.Ed]

If we're talking a four pot screamer, so would I!:ayyy:

[Captain]

Moriwaki debuts first 600GP prototype at Suzuka

The ink’s not even dry yet on Dorna’s ruling that 250GP will turn into a class for 600cc four-strokes in 2011, but Moriwaki has rolled out a prototype of what it thinks a 600GP competitor should look like. Unlike KTM or Aprillia, who still insist they won’t participate in the new class, Moriwaki is considering running a factory team and brought the prototype to display at the Suzuka 8 Hours as a statement of intent.

http://www.motorbox.com/static/upl/m/moriwakigp600-10356-002-f.jpg

Moriwaki’s 600GP prototype use a CBR600RR engine housed in a bespoke tubular steel chassis that allows the fitment of a much longer, MotoGP-style swingarm. Also present is GP-spec Öhlins suspension and a neat GP-style exhaust. The rest of the machine is fairly rough, running 250GP bodywork and stock CBR clocks for instance. This is to be expected, Dorna hasn’t finalized rules for the new class yet and it’s not even known if engines will be production or prototype-spec. Rather, this appears to be a working concept from Moriwaki, brought out to gauge interest and sponsorship opportunities should they decide to enter the series.

It’ll be interesting to see what becomes of the two-year new team hiatus idea that’s been thrown around. Intended to allow existing teams time to adapt to such a drastic change in racing formulas without facing competition from new players able to capitalize on existing four-stroke knowledge, it could mean that Moriwaki would have to wait until 2013 to enter the series. Comprehensive rules for 600GP are expected to be agreed upon later this year.

http://www.motorbox.com/static/upl/m/moriwakigp600-10356-003-f.jpg

[Captain]

1997 AguÌ GP6 previews Moto2 racers

Like the Moriwaki 600GP Prototype, this AguÌ GP6, hailing from 1997, provides an excellent idea of what we can expect from the four-stroke 600cc prototypes that will race in Moto2. It houses a tuned version of a CBR600 engine in a prototype frame fitted with common period racing components. Wait, that doesn't sound like a GP bike, what gives?

http://hellforleathermagazine.com/images/Agui_GP6_1.jpg

In an effort to reduce costs and level the playing field, the new Moto2 rules are heavy on the list of items not allowed and light on what is permitted. The engines will have a maximum capacity of 600cc, no more than four pistons, will have capped rev limits, no pneumatic valves, no variable valve timing or lift, no variable-length inlets, no direct fuel injection, and must use internal components manufactured from an iron-based alloy, pistons from an aluminum alloy and crank cases and cylinder heads cast from aluminum alloy as well. Check out the complete list for like a dozen more things engines can't have.

Three or four years ago, it would have been easy to say that this basically amounted to a production 600 supersport engine. Not any longer. Take the 2009 Yamaha R6 for example, it uses variable-length inlets and a ride-by-wire throttle, its engine wouldn't meet Moto2 regs.

So what will power the Moto2 bikes if not production engines? We expect the factories to use the knowledge they've gained building and tuning their current 600cc engines to produce bespoke units based on current thinking and practices, but shorn of fancy high-tech features. They'll obviously be in a racing state of tune, so expect 20bhp or more than the current 120-130bhp production 600 engines. Just like the CBR-based GP6, those engines will be housed in prototype chassis -- don't rule out steel trellis units, they're extraordinarily cost-effective -- running top-of-the-line suspension. With a minimum weight for four-cylinder machines set at 135kg, the Moto2 bikes will perform vastly better than any road-going 600, but 100% prototype GP machines these ain't.

http://hellforleathermagazine.com/images/Agui_GP6_2.jpg

The one saving grace of this technological dumb down is that it could lead to incredibly competitive racing. Just like that currently displayed in World Supersport and Superbike. In fact, come to think of it, we're rapidly beginning to care about those two series much more than anything organized by Dorna.

[Kimbo]

I read somewhere that Yamaha were suppling the motors for the 600 class

[Lopeman]

I think dorna has got the right idea but gone about it the wrong way. I hate the idea that they are using production based engines from 600cc. There is already a world class format that use them in Super Sport. I don't care if the MOTO2 go 3 seconds a lap quicker.

They should be limited to 500cc and rules should be made to provide initiave for manufactures to build something a little bit different. V3's Parallel twins, V4's even a bloddy boxer engine. It would be far more interesting and more benefit to us road riders as we bay get some more interesting bikes on the road in the near future. Costs could be kept down by making rules that limit materials used and longevity of an engine.

And whats happening to the 125ccc class. 250cc is turning into moto2, is 125cc turning into moto3? with 400cc engines, cause not one of the manufacturers (as far as i'm aware of) makes anything in 400cc that would be suitable for turning into a race bike

[Captain]

I assume the world is a big enough place to run two separate competitions (SBK and motoGP). I guess the challenge is to differentiate it a bit, which is hard to do with bikes because .... well because they are just so similar.
What could they do? Go to a country v country format (like that F1 thing ... A1GP or something ...) which i really don't care for.

[Lopeman]

I agree, i love both Moto GP and SBK but i dont see the point of having 2 production derived 600cc inline 4stroke classes. They will just compete against each other and one will come up trumps, which isnt the best thing for viewers.

A bit of variation is what is needed. I dont care what they race, as long as its good hard fast racing i'll tune in.