United Motors motorcycle engines
EPA certification records list 11 highway motorcycle engine families from United Motors, model years 2007–2009. Rated power ranges from 3 to 57 kW, median 7 kW. All listed families displace 49 cc. The most families were certified in 2009 (6).
Engine families11
Engine models5
Model years2007–2009
Power range3–57 kWmedian 7 kW
Displacement49 cc – 49 cc
Rank in category#101of 108 makers by families
Power distribution
Number of engine families by rated power.
Families certified per year
Technical mix
Fuel
Gas11
Configuration
41021
Cylinders
1 cyl92 cyl2
Most certified engine models
of America Inc. 20095of America Inc. 20082of America Inc. 20072Scooter150S1
Engine families
| Family | Model | Year | Displacement | Power | Fuel |
|---|---|---|---|---|---|
9UMAC.049UM2 | Scooter | 2009 | 49 cc | 3 kW | Gas |
9UMAC.249AQU | of America Inc. 2009 | 2009 | — | 20 kW | Gas |
9UMAC.249MS3 | of America Inc. 2009 | 2009 | — | 18 kW | Gas |
9UMAC.647GTH | of America Inc. 2009 | 2009 | — | 57 kW | Gas |
9UMAC0.15NFG | of America Inc. 2009 | 2009 | — | 6 kW | Gas |
9UMAC0.17MTX | of America Inc. 2009 | 2009 | — | 7 kW | Gas |
8UMAC0.15NFG | of America Inc. 2008 | 2008 | — | 6 kW | Gas |
8UMAC0.17MTX | of America Inc. 2008 | 2008 | — | 7 kW | Gas |
7UMAC.196SMF | 50S | 2007 | — | 11 kW | Gas |
7UMAC0.15NFG | of America Inc. 2007 | 2007 | — | 6 kW | Gas |
7UMAC0.17MTX | of America Inc. 2007 | 2007 | — | 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:UMA). 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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