Honda and Yamaha use pneumatic valves for their factory prototypes, while Ducati has its trademark Desmodromic valve system. The Honda Production Racer will not have pneumatic valves or a seamless shift gearbox in order to contain costs. However the Yamaha privateer package will use 2013 spec M1 engines, including pneumatic valves.
Privateer entries must use the full standard ECU system next season, but will have four extra litres of race fuel available and can make twelve rather than five engine changes during the year, relative to the factory bikes.
Update: Barbera continued to struggle with chatter in the race and retired as a result:
"Despite having used for the first time the new engine, we have not been able to obtain any advantage of it because of the problems we have had with the bike. It is true that I like the engine and it feels better, both in acceleration and speed, but the presence of an excessive chattering has deprived us of the chance of achieving a good result.
"During the race I have tried to minimise the problem by trying different ways to ride, but it has been impossible. The riding was increasingly more difficult and I have chosen to stop in my pit-box to avoid a possible fall. Tomorrow we have test and we have to find out what has happened."