GST Motor motorcycle engines
EPA certification records list 16 highway motorcycle engine families from GST Motor, model years 2022–2026. Rated power ranges from 2 to 8 kW, median 7 kW. All listed families displace 49 cc. The most families were certified in 2025 (5).
Engine families16
Engine models5
Model years2022–2026
Power range2–8 kWmedian 7 kW
Displacement49 cc – 49 cc
Rank in category#69of 108 makers by families
Families certified per year
Technical mix
Fuel
Gas16
Configuration
416
Cylinders
1 cyl16
Most certified engine models
1P61Qmk-A41P39Qma-241P61Qmk31P57Qmj31P39Qma2
Engine families
| Family | Model | Year | Displacement | Power | Fuel |
|---|---|---|---|---|---|
TGSTC.049MC2 | 1P39Qma | 2026 | 49 cc | 2 kW | Gas |
TGSTC.169MCA | 1P61Qmk | 2026 | — | 8 kW | Gas |
TGSTC.169MCC | 1P61Qmk-A | 2026 | — | 8 kW | Gas |
SGSTC.049MC1 | 1P39Qma-2 | 2025 | 49 cc | 2 kW | Gas |
SGSTC.049MC2 | 1P39Qma | 2025 | 49 cc | 2 kW | Gas |
SGSTC.169MCA | 1P61Qmk | 2025 | — | 8 kW | Gas |
SGSTC.169MCB | 1P61Qmk-A | 2025 | — | 8 kW | Gas |
SGSTC.169MCC | 1P61Qmk-A | 2025 | — | 8 kW | Gas |
RGSTC.049MC1 | 1P39Qma-2 | 2024 | 49 cc | 2 kW | Gas |
RGSTC.150MCA | 1P57Qmj | 2024 | — | 7 kW | Gas |
RGSTC.169MCA | 1P61Qmk | 2024 | — | 8 kW | Gas |
RGSTC.169MCB | 1P61Qmk-A | 2024 | — | 8 kW | Gas |
PGSTC.049MC1 | 1P39Qma-2 | 2023 | 49 cc | 2 kW | Gas |
PGSTC.150MC1 | 1P57Qmj | 2023 | — | 7 kW | Gas |
NGSTC.049MC1 | 1P39Qma-2 | 2022 | 49 cc | 2 kW | Gas |
NGSTC.150MC1 | 1P57Qmj | 2022 | — | 7 kW | Gas |
Other motorcycle engines makers
Source
US Environmental Protection Agency engine certification data. Model year and manufacturer are decoded from EPA engine family codes (EPA codes:GST). An engine family is a group of engines certified together; one family can cover several power ratings.
Engine calculators
Torque, power and BMEPPower from torque and RPM · Torque from power and RPM · Brake mean effective pressure (BMEP)Engine displacementDisplacement from bore, stroke and cylinders · Bore from displacement and stroke · Stroke from displacement and boreBSFC and thermal efficiencyBSFC from power and fuel flow · Fuel flow from power and BSFC · Thermal efficiency from BSFCCompression ratioStatic compression ratio · Chamber volume for a target compression ratio · Theoretical compression pressurePiston speedMean piston speed · Maximum RPM for a piston speed limit · Rod ratio, piston velocity and acceleration
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