EPA engine family
Engine family AZTWC.150SAA
If this code is printed on your emission label, this is your machine's federal record: sold under Zhejiang Taizhou Wangye Power (Usa) Co., Ltd., with an engine built by Zhejiang Taizhou Wangye Power, certified as street-legal scooters and motorcycles.
- Displacement
- —
- Model years
- 2010
- Models certified
- 15
- Certificates
- 1
What this record says
- Sold in the US by
- Zhejiang Taizhou Wangye Power (Usa) Co., Ltd.
- Engine built by
- Zhejiang Taizhou Wangye Power
- Vehicle category
- Highway Motorcycle - Ib (50-169cc)
- Certificate numbers
- AZTWC.150SAA-002-R01
What the number itself says
Reading AZTWC.150SAA left to right: A is the model-year letter for 2010, ZTW is the three-character code the EPA assigned to Zhejiang Taizhou Wangye Power (Usa) as certificate holder, C marks a highway (street-legal) certification, .150 is the displacement in litres, so 150cc and SAA is Zhejiang Taizhou Wangye Power (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 certificate describes a four-stroke, single-cylinder engine with 2 valves per cylinder fed by carburettor, run by an ignition control module (CDI-type ignition). There is a catalytic converter in the exhaust, recorded as "oxidizing catalyst only". The head carries a pulse secondary-air (PAIR) valve.
Rated power on the record is 5.9 kW (about 8 hp) at 7,000 rpm, driving through an automatic.
- Cylinders / valves
- 1 · 2 per cylinder
- Cycle
- four-stroke
- Fuel delivery
- carburettor
- Oxygen sensor
- no
- Engine control
- ICM
- Catalytic converter
- oxidizing catalyst only
- Air injection
- PAIR
- Rated power
- 5.9 kW (≈8 hp)
- Rated speed
- 7,000 rpm
- Transmission
- automatic
- Sales area
- 49S
- Vehicle built by
- Zhejiang Taizhou Wangye Power Co., Ltd.
- Test vehicle model
- WY150T-3
Filing history and where it was sold
Zhejiang Taizhou Wangye Power (Usa) filed one certificate under this family, for model year 2010, sold as 49-state (not certified for sale in California).
The vehicle itself is recorded as built by the same company, Zhejiang Taizhou Wangye Power Co., Ltd. in China — engine and chassis from one source.
Certified emission levels: CO 5.2, HC 0.20, NOx 0.26 g/km.
Models certified under AZTWC.150SAA
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.
WY125-11 · WY125T-21 · WY125T-23 · WY125T-41 · WY125T-65 · WY125T-73 · WY125T-9 · WY150-5 · WY150T · WY150T-16 · WY150T-18 · WY150T-20 · WY150T-3 · WY150T-33 · WY150T-36
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.