MotoGP Updated engine.

The following list shows the number of engines in use (or 'opened') by each MotoGP rider as of warm-up in Argentina, round 3 of 18. 

'Withdrawn' means that an engine cannot be used again. 

The Factory class Honda and Yamaha riders are restricted to five engines for the season, while the others have a maximum of 12 engines available. 

Factory class: 

Marco Melandri (Aprilia): 5 engines [1 withdrawn] 

Andrea Iannone*** (Ducati): 3 engines 
Marc Marquez* (Honda): 3 engines 
Alvaro Bautista (Aprilia): 3 engines 

Valentino Rossi (Yamaha): 2 engines 
Jorge Lorenzo (Yamaha): 2 engines 
Bradley Smith (Yamaha): 2 engines 
Pol Espargaro (Yamaha): 2 engines 
Andrea Dovizioso (Ducati): 2 engines 
Danilo Petrucci (Ducati): 2 engines 
Yonny Hernandez** (Ducati): 2 engines 
Dani Pedrosa (Honda): 2 engines 
Cal Crutchlow (Honda): 2 engines 
Scott Redding (Honda): 2 engines 
Aleix Espargaro (Suzuki): 2 engines 
Maverick Vinales (Suzuki): 2 engines 
Alex de Angelis (Aprilia): 2 engines 

* Marquez suffered an engine problem during qualifying in Texas, requiring a third engine to be opened. However none of Marquez's engines have been withdrawn, meaning the Texas engine could return to use after being checked. 

** Hernandez's bike caught fire during the race in Argentina, after this engine list was issued. 

*** Iannone suffered an engine issue during practice in Argentina but, as with Marquez, while a third engine was opened no engines have yet been withdrawn. 

Open class: 

Stefan Bradl (Yamaha Forward): 3 engines [1 withdrawn] 
Karel Abraham (Honda): 3 engines 
Jack Miller (Honda): 3 engines 

Loris Baz (Yamaha Forward): 2 engines 
Hector Barbera (Ducati): 2 engines 
Mike di Meglio (Ducati): 2 engines 
Eugene Laverty (Honda): 2 engines 
Nicky Hayden (Honda): 2 engines