M4 ECSTAR Suzuki GSX-R1000 Mazda Raceway Laguna Seca
  • 7 years ago
MotoAmerica Superstock 1000 racer Jake Lewis and his M4 ECSTAR Suzuki crew chief, Ben Fox, describe the modifications made to the new GSX-R1000 and how those changes have improved the bike's on-track performance this season.