EPA engine family
Engine family ATAOX.124AAA
If this code is printed on your emission label, this is your machine's federal record: sold under Taotao USA Inc., with an engine built by Zhejiang Taotao, certified as off-road machines.
- Displacement
- —
- Model years
- 2010
- Models certified
- 15
- Certificates
- 1
What this record says
- Sold in the US by
- Taotao USA Inc.
- Engine built by
- Zhejiang Taotao
- Vehicle category
- Off-Road Motorcycle
- Certificate numbers
- ATAOX.124AAA-001
What the number itself says
Reading ATAOX.124AAA left to right: A is the model-year letter for 2010, TAO is the three-character code the EPA assigned to Taotao USA as certificate holder, X marks an off-road certification, .124 is the displacement in litres, so 124cc and AAA is Taotao USA's own sequence for that year. Nothing in the number names the factory — that comes from the certificate itself.
The engine, as described on the certificate
The test vehicle Taotao USA submitted for this family (model ATD125-A) carried engine code TZH157FMI. In the Chinese engine-model convention that reads as one cylinder with a nominal 57 mm bore, FMI series.
The certificate describes a four-stroke, single-cylinder engine with 2 valves per cylinder fed by carburettor. There is a catalytic converter in the exhaust, recorded as "TWC, single bed, open loop". The head carries a pulse secondary-air (PAIR) valve.
Rated power on the record is 5 kW (about 7 hp) at 7,000 rpm, driving through a 5-speed manual gearbox.
- Engine code on test vehicle
- TZH157FMI
- Nominal bore (from the code)
- 57 mm
- Cylinders / valves
- 1 · 2 per cylinder
- Cycle
- four-stroke
- Fuel delivery
- carburettor
- Oxygen sensor
- no
- Catalytic converter
- TWC, single bed, open loop
- Air injection
- PAIR
- Rated power
- 5 kW (≈7 hp)
- Rated speed
- 7,000 rpm
- Transmission
- 5-speed manual gearbox
- Sales area
- 50S
- Vehicle built by
- Zhejiang Taotao Industry Co., Ltd.
- Test vehicle model
- ATD125-A
Filing history and where it was sold
Taotao USA filed one certificate under this family, for model year 2010, sold as 50-state, California included.
The vehicle itself is recorded as built by the same company, Zhejiang Taotao Industry Co., Ltd. in China — engine and chassis from one source.
Certified emission levels: CO 4.2, HC+NOx 0.8 g/km.
Other records carrying the same engine code
Taotao USA certified an engine with this code under 18 other family numbers — the same engine filed again in another year, or in an off-road and a street version:
- 9TAOX0.12A1T (2009)
- 9TAOX.124AAA (2009)
- ATAOX0.12A1T (2010)
- BTAOX0.12A1T (2011)
- BTAOX.124AAA (2011)
- CTAOX0.12A1T (2012)
- CTAOX.124AAA (2012)
- DTAOX0.12A1T (2013)
- DTAOX.124AAA (2013)
- ETAOX0.12A1T (2014)
- ETAOX.086DB1 (2014)
- ETAOX.124AAA (2014)
- FTAOX0.12A1T (2015)
- FTAOX0.11ATB (2015)
- FTAOX.124AAA (2015)
- GTAOX0.11ATB (2016)
- GTAOX0.12A1T (2016)
- GTAOX.124AAA (2016)
A shared code from the same factory is a strong search lead. From a different factory it is as often a naming coincidence. Either way it narrows the search; it does not settle it — measure before you buy.
Models certified under ATAOX.124AAA
Every model designation the importer listed on this certificate. If your machine's model name appears here, this is the right record — even if the name on the bodywork is slightly different.
ATD110-A · ATD110-B · ATD110-C · ATD110-D · ATD110-E · ATD125-A · ATD125-B · ATD125-C · ATD125-D · ATD125-E · ATD90-A · ATD90-B · ATD90-C · ATD90-D · ATD90-E
Other American badges on engines from the same factory
Related in the registry
Source. US EPA annual certification data — EPA Certified Highway Motorcycle Test Results, MY2006-present; EPA Certified Off-Road Motorcycle / ATV / UTV / Rec Vehicle, MY2006-present. Retrieved 2026-09-07. Full provenance and method.