EPA engine family
Engine family CESYX.124STA
If this code is printed on your emission label, this is your machine's federal record: sold under Easy Vehicle, Inc., with an engine built by Zhejiang Easy Vehicle Co.,Ltd, certified as ATVs.
- Displacement
- —
- Model years
- 2012
- Models certified
- 19
- Certificates
- 1
What this record says
- Sold in the US by
- Easy Vehicle, Inc.
- Engine built by
- Zhejiang Easy Vehicle Co.,Ltd
- Vehicle category
- ATVA-Meet EPA & ARB ATV Definition
- Certificate numbers
- CESYX.124STA-001
What the number itself says
Reading CESYX.124STA left to right: C is the model-year letter for 2012, ESY is the three-character code the EPA assigned to Easy Vehicle as certificate holder, X marks an off-road certification, .124 is the displacement in litres, so 124cc and STA is Easy Vehicle'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 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 5.4 kW (about 7 hp) at 8,000 rpm, driving through a 3-speed manual gearbox.
- Cylinders / valves
- 1 · 2 per cylinder
- Cycle
- four-stroke
- Fuel delivery
- carburettor
- Oxygen sensor
- no
- Engine control
- other
- Catalytic converter
- TWC, single bed, open loop
- Air injection
- PAIR
- Rated power
- 5.4 kW (≈7 hp)
- Rated speed
- 8,000 rpm
- Transmission
- 3-speed manual gearbox
- Sales area
- 50S+49S
- Vehicle built by
- ZHEJIANG EASY VEHICLE CO.,LTD
- Test vehicle model
- YX125
Filing history and where it was sold
Easy Vehicle filed one certificate under this family, for model year 2012, sold as both a 50-state and a 49-state version.
The vehicle itself is recorded as built by the same company, ZHEJIANG EASY VEHICLE CO.,LTD in China — engine and chassis from one source.
Certified emission levels: CO 9.4, HC+NOx 0.4 g/km.
Models certified under CESYX.124STA
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.
TE110 · TE125 · YB110 · YF110 · YF125 · YH110 · YH125 · YK110 · YL110 · YL125 · YM110 · YN110 · YN125 · YP110 · YP125 · YR110 · YS110 · YX110 · YX125
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.