250GP officially replaced with four-stroke 600s

Have a look at this especially at the weights.A 600 four-stroke four heavier then a motogp 800!!!! I don't get it. Nutters.

Rules
Maximum capacity 600cc, Maximum four cylinders, No oval pistons RPM limited, No pneumatic valve operation systems, or variable timing.

INLET AND FUEL SYSTEM
Throttle body diameter limited
Fuel injector type limited
Fuel spec – standard unleaded fuel

GEARBOX
Six speed gearbox
Limited alternate gear ratios available
ELECTRONICS
RPM limiter on each bike

CHASSIS
Design and construction of the chassis is free

WEIGHT
One and two cylinders (TBA)
Three cylinders (TBA)
Four cylinders (155kg)
Other points:
No carbon brakes
No carbon composite wheels
Teams can only scrutineer one motorcycle per rider Limited number of complete engines per rider at each event

Current FIM rules

2.5 Weights

2.5.1 The following are the minimum weights permitted:
– 125cc motorcycle + rider 136 kg
– 250cc 1 cylinder motorcycle 100 kg 2 cylinders motorcycle 100 kg
– MotoGP 2 cylinders or less motorcycle 133 kg 3 cylinders motorcycle 140,5 kg 4 cylinders motorcycle 148 kg 5 cylinders motorcycle 155,5 kg 6 cylinders or more motorcycle 163 kg

Found this also.

The proposals were greeted with scorn and disdain by KTM and Aprilia. The only two manufacturers to actually produce up-to-date racing machinery for the class felt that the rules had been rigged in the Japanese manufacturers' favor, with all of the Big Four having inline four motors ready to use from their road bikes. What's more, Dorna was entering dangerous waters, with rumors abounding that FGSport, the organizers of the World Superbike and World Supersport series had cast-iron guarantees from the FIM that they would have a monopoly on international racing based on production machinery.

At Mugello, the first rumors of a counter-proposal started to emerge, and this week, those rumors grew stronger. Motorcycle News is saying that KTM will be proposing to replace the two strokes with 500cc four-stroke twins. According to MCN, the twins would be subject to a limit on the number of input pins for data sensors, as well as having revs limited and pneumatic valves banned.

Aprilia had previously announced that it would be withdrawing from the proposed future 250 class to focus on a re-entry into the MotoGP class, but 500cc twins may reawaken their interest. Aprilia already have the SXV 450 and 550 supermoto and RXV 450 and 550 enduro / motocross bikes, featuring a V twin which is likely to make an excellent basis for a 500cc twin class. No response has yet been forthcoming from Aprilia, but they are sure to be asked about it very soon.

Thanks Dimitri.

I think those specs you list are from older proposals and the only thing that's been finalized is the maximum capacity. The maximum weight etc are still open for discussion, even if that just means Dorna is waiting to hear what Honda would like it to do.

Make sure you check out the rest of our coverage of the 250GP Replacement Saga.

This is a massive letdown. One more thing to push me away from Moto GP, which i have to say, is past its glory days. So after this, we will have an 800CC class and a 600CC class, both restricted to four strokes. Thus essentially the same class twice. Moto GP is quite boring enough for me thanks, Dorna, id rather not have two boring classes on a Sunday morning.

If the manufacturers want to peddle bikes off the back of racing, they have WSBK, and all the national superbike championships, as well as the 800s. They banned the two strokes in Moto GP (thanks Honda), and now killing off the smaller capacities as well?

Screw this, im moving to Supermonos.