Riders in next year's MotoGP world title will only be able to use one machine at each event, and a maximum of six engines during the entire championship.
They are just two of the amendments made to the 2010 regulations by the Grand Prix Commission, which recently met in Spain to finalise the arrangements for next year.
Twin clutch systems, now common in high-end sportscars, have also been banned in 2010, and other rules include:
Carbon composite front brake discs must be of one diameter only and two types of mass. The diameter will be 320mm only.
The maximum fuel injection pressure is 10 Bar.
MMC (Metal Matrix Composite) & FRM (Fiber Matrix Material) shall not be permitted.
Temperature sensor for the tyre will not be permitted.
From 2010-2012, the rim width shall be limited to two sizes for front and one size for rear for each manufacturer. Wheels diameter shall be limited to 16.5 inches only.
Variable exhaust system shall not be permitted.
Variable Valve Timing system and Variable Valve Lift system powered by electric and/or liquid, shall not be permitted.
Connecting rod shall not be a hollow structure but less than 2mm oil pass tunnel is permitted.
Automatic transmission shall not be permitted. But manual transmission assisted by small force shall be permitted.
Consecutive Variable Transmission shall not be permitted.
Only DORNA can supply GPS unit just for entertainments such as TV broadcasting, which can't connect to CPU unit by any kind of system.
Electric/electronic steering damper system shall not be permitted.
Minimum weight of motorcycle shall be the existing one + 2kg. (ex: 150 kg for 4 cylinders).
Only five people can work on the machine in the pits.
Riders who enter the championship for the first time (Rookies) must be entered by a non-factory team.