found this interesting copied off the inter web:
Take a look at how many engines the premier class riders have left for the rest of the season
Tags MotoGP, 2018, GRAN PREMI MONSTER ENERGY DE CATALUNYA
The regulations in the MotoGPâ„¢ World Championship state that each rider has a total of seven engines per season, with riders who participate in teams with concessions having a total of nine engines. That said, how many engines does each rider have left as we gear up for Round 7?
Tom Lüthi (EG 0.0 Marc VDS) is the rider who has used the least number of engines so far this season, he's still on his second motor. Meanwhile, after Mugello, Marc Márquez (Repsol Honda Team) and teammate Dani Pedrosa have used three engines each, the same amount as Monster Yamaha Tech 3 rider Johann Zarco.
Jorge Lorenzo (Ducati Team), Takaaki Nakagami (LCR Honda Idemitsu), Karel Abraham (Angel Nieto Team) and Xavier Siméon (Reale Avintia Racing) have also used three engines, along with Franco Morbidelli (EG 0,0 Marc VDS), who's second engine broke on Italian soil.
Alma Pramac Racing's Danilo Petrucci and Jack Miller are onto their fourth engine, the same as Tito Rabat (Reale Avintia Racing), Alvaro Bautista (Angel Nieto Team) and Cal Crutchlow (LCR Honda Castrol).
Maverick Viñales and teammate Valentino Rossi (Movistar Yamaha MotoGP) have also used four, with Andrea Dovizioso (Ducati Team) also on his fourth engine after his technical problem during Mugello's FP2 session.
Regarding the teams that have concessions, Alex Rins (Team Suzuki Ecstar) and teammate Andrea Iannone have used three engines each, as has Pol Espargaró (Red Bull KTM Factory Racing) and Scott Redding (Aprilia Racing Team Gresini). Bradley Smith (Red Bull KTM Factory Racing) and Aleix Espargaro (Aprilia Racing Team Gresini) have used four engines so far in 2018.