Class Schedule

• SP・NSF100SP

  Mixed class with modified vehicles with a displacement of 50cc and 2-stroke transmission and HRC-made 4-stroke mini bike racer "NSF100" with wheel diameter of 12-17 inches.

• NSF100 HRC Trophy

  One-make class featuring the HRC-made 4-stroke mini bike racer "NSF100"

• HRC GROM Cup Advance Class

  One-make class featuring the HRC-made race-only production racer "HRC GROM"
  Tires are DUNLOP one-make
  The Advance Class is an advanced class for Riders who exceed the standard lap time of 49 seconds

• HRC GROM Cup Rookie Class

  One-make class featuring the HRC-made race-only production racer "HRC GROM"
  Tires are DUNLOP one-make
  The Rookie Class is an introductory class for Riders who have lap times below the standard lap time of 49 seconds

• Challenge Advance

  A mixed class of the Expert Class, which has a specified lap time exceeding 48 seconds, and the 48 Class, which has a specified lap time of 48 seconds
  Class for vehicles equipped with a 50cc 2-stroke or 100cc 4-stroke engine with a transmission
  The combination of frame and engine is not restricted as long as the engine can be mounted without modification to the manufacturer-shipped frame, such as without processing stays

• Challenge 50

  Challenge class with a specified lap time of 50 seconds
  Class for vehicles equipped with a 50cc 2-stroke or 100cc 4-stroke engine with a transmission
  The combination of frame and engine is not restricted as long as the engine can be mounted without modification to the manufacturer-shipped frame, such as without processing stays

• Challenge 52

  Challenge class with a standard lap time of 52 seconds
  Class for vehicles equipped with a 50cc 2-stroke or 100cc 4-stroke engine with a transmission
  The combination of frame and engine is not restricted as long as the engine can be mounted without modification to the manufacturer-shipped frame, such as without processing stays

• 48 Hours Endurance

  Endurance class with a standard lap time of 48 seconds
  Vehicle regulations are the same as the Challenge class, and up to the 3rd Rider can be registered

• 49 Hours Endurance

  Endurance class with a regulated lap time of 49 seconds
  Vehicle regulations are the same as the Challenge class, and up to the 3rd Rider can be registered

• GROM Cup Endurance

  Endurance class using the HRC-manufactured competition-only production racer "HRC GROM"
  Vehicle regulations are the same as the HRC GROM Cup, and up to the 3rd Rider can be registered

• TAN (Solo Endurance)

  Endurance class with only one registered Rider
  Vehicle regulations are the same as the Challenge class, with two mandatory 8-minute pit stops