SuperbikeMag.com Trophy 2025 R.3

Rider & Motorcycle Eligibility

🏁 Technical Regulations for the “Modify” Class

The technical regulations for race vehicles in the “Modify” class are based on original factory engine specifications (OEM) with specific restrictions in place to prevent unauthorized changes to engine type or structural modifications that violate competition rules.

Modifications are allowed under the condition that the core engine structure must remain unchanged, specifically:

  1. Engine Block / Crankcase
    ➡️ Must be the original factory engine from the same model as the registered race bike.
  2. Number of Cylinders & Configuration
    ➡️ For example, if the production model uses an inline 4-cylinder, this layout must be maintained.
  3. Crankshaft Position
    ➡️ Modifying or relocating the crankshaft to change engine characteristics is prohibited.
Definition of “Modify”
“Modify” refers to the freedom granted to competitors to alter, replace, or adapt internal engine components while maintaining the OEM structural foundation. There are no performance limits, provided the engine originates from a manufacturer-approved motorcycle model that is used in the actual race.

Permitted Modifications (with conditions):

  • Camshaft
    → Camshaft angle, lift, or design may be changed without restriction.
  • ECU / Fuel System
    → Use of standalone ECUs, piggyback units, fuel injectors, fuel pumps, and other components is allowed freely.
  • Exhaust System
    → No restrictions on materials (e.g. titanium, carbon, stainless steel), design, or throttle body size.
  • Quickshifter / Launch Control
    → Installation and use are permitted.
  • Cylinder Head
    → Aftermarket heads are allowed if they match the original engine mount positions.
    → No limits on valve size, number, material, porting, or camshaft configuration.
  • Cylinder Block
    → May be modified or replaced, but must be mounted to the original engine case mounting points without changing the structural layout.
  • Crankshaft
    → Custom or lightweight crankshafts are allowed if designed for the specific model.
  • Clutch System
    → Upgraded clutches and slipper clutches are permitted.
  • Stroke / Bore
    → May be modified to increase or decrease engine displacement (cc) based on race strategy.

Driver and Vehicle Requirements (Click to view details)

  1. FUCHS Silkolene Superbike 1000cc
  2. SuperSport 600cc.
  3. Honda Mini bike Trophy 125cc
  4. SuperMoto 450cc.
  5. SuperMoto 300cc.
  6. SuperSport 400cc. – Class B
  7. Sportbike 200cc. 4T- Class A
  8. SuperBike 1000cc. Rookie
  9. Mini Bike 150cc.
  10. Scooter 200cc.
  11. SuperSport 400cc. – Class A
  12. Scooter 400cc.
  13. Sportbike 200cc. 4T – Class B
  14. Naked Bike – Class A
  15. Naked Bike – Class B
  16. Honda Cup
  17. KTM 390 Series
  18. Eurobike Cup

🏁 FUCHS Silkolene Superbike 1000cc

Rider Eligibility:

🚫 Riders who have previously been champions in the Thailand Championship (top level) in the following classes: SB1: SuperBike 1000cc / ST1: SuperStock 1000cc / 600SS1: Supersport 600cc (SS1) / 400SS1: Supersport 400cc (SS1), within a period of 5 years from the year they competed in those classes, are not allowed to participate.

Motorcycle Eligibility:

🏍️ Superbike with engine capacity from 800cc to 1200cc such as:

  • Yamaha R1/R1M

  • Kawasaki Ninja ZX-10R / ZX-10RR

  • BMW S1000RR / M1000RR

  • Honda CBR1000RR-R Fireblade SP / M1000RR

  • Suzuki GSX-R1000 / GSX-R1000R

  • Aprilia RSV4 / RSV4 Factory

  • DUCATI Panigale V4 / V4 S / V4 R

📦 Must be a production model available on the market
🔧 “Modifications” are allowed under the condition that the core structure remains “unchanged” (Refer to technical regulations under the “Modify” class rules)

🏁 SuperSport 600cc.

Rider Eligibility:

🚫 Riders who have previously been champions in the Thailand Championship (top level) in the following classes:
SB1: SuperBike 1000cc / ST1: SuperStock 1000cc / 600SS1: Supersport 600cc (SS1) / 400SS1: Supersport 400cc (SS1),
within 5 years from the year they competed in those classes, are not allowed to compete in this category.

Motorcycle Eligibility:

🏍️ SuperSport motorcycles with engine capacities ranging from 500cc to 600cc, such as

  • Yamaha R6
  • Honda CBR600RR
  • Suzuki GSX-R600
  • Kawasaki ZX6
  • Yamaha R7 is also permitted to compete in this category.
  •  

📦 Must be a production model available on the market
🔧 “Modifications” are allowed under the condition that the core structure remains “unchanged” (Refer to technical regulations under the “Modify” class rules)