Postoje ograničenja za agregate, evo pravilnika:
Technical Specifications for 2012 for the MotoGP class
Capacity: up to 1,000cc
Number of maximum cylinders: 4
Maximum bore: ø 81 mm
Minimum weight: 150 kg (up to 800cc) and 153 kg (over 800cc)
Maximum number of engines available for use by each rider: 6
Fuel tank capacity: 21 litres
Exception for Claiming Rule Teams (CRT's) approved by the Grand Prix Commission.
The selecion of the Claiming Rule Teams (CRT’s) will be by unanimous decision of the Grand Prix Commission. Modification to this exception due to performance of the teams requires the simple majority of the Grand Prix Commission.
Maximum number of engines available for use by each rider: 12
Fuel tank capacity: 24 litres
What engine modifications are allowed for the CRT bikes?
As we said before, there is nothing in the rulebook about the engines, other than that they can have a maximum of 4 cylinders and a maximum bore of 81mm. There are a few stipulations about the materials which may be used in any MotoGP engine, but what it basically comes down to is that there are no limits on what can be done to the engines. It is perfectly legal to take, say, a Yamaha YZF-R1 engine, modify the bore and stroke to be 81mm x 48.5mm, remove the chain cam drive and fit a gear cam drive and replace the steel spring valves with pneumatic valves or desmodromic valves (they may be a core Ducati technology, but Bologna does not own the technology). It is legal to change valve diameters, and use different valve materials. It is legal to change the throttle bodies, the fuel pumps, and add variable inlet tracts. Claiming Rule Teams are free to do whatever they like to their engines.
CRT FAQ: Everything You Always Wanted To Know About The Claiming Rule Teams, But Were Afraid To Ask
http://motomatters.com/analysis/2011/11/22/crt_faq_everything_you_always_wanted_to_.html