Engine family FWGYC.049WYC

What this record says

Sold in the US by

Wangye USA Co., LLC

Engine built by

Zhejiang Taizhou Wangye Power

Vehicle category

Highway Motorcycle - Ia (<50cc)

Certificate numbers

FWGYC.049WYC-001

What the number itself says

Reading FWGYC.049WYC left to right: F is the model-year letter for 2015, WGY is the three-character code the EPA assigned to Wangye USA Co. as certificate holder, C marks a highway (street-legal) certification, .049 is the displacement in litres, so 49cc and WYC is Wangye USA Co.'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 Wangye USA Co. submitted for this family (model WY50QT-4) carried engine code 139QMB. In the Chinese engine-model convention that reads as one cylinder with a nominal 39 mm bore, QMB series. Against the certified 49cc that implies a stroke of roughly 41 mm — a sanity check for a piston or cylinder listing, not a published figure.

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 "oxidizing catalyst only". The head carries a pulse secondary-air (PAIR) valve.

Rated power on the record is 2.4 kW (about 3 hp) at 8,000 rpm, driving through a CVT (belt and variator).

Engine code on test vehicle

139QMB

Nominal bore (from the code)

39 mm · implied stroke ≈ 41 mm

Cylinders / valves

1 · 2 per cylinder

Cycle

four-stroke

Fuel delivery

carburettor

Oxygen sensor

no

Catalytic converter

oxidizing catalyst only

Air injection

PAIR

Rated power

2.4 kW (≈3 hp)

Rated speed

8,000 rpm

Transmission

CVT (belt and variator)

Sales area

49S

Vehicle built by

Zhejiang Taizhou Wangye Power Co.,Ltd.

Test vehicle model

WY50QT-4

Filing history and where it was sold

Wangye USA Co. filed one certificate under this family, for model year 2015, 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 6.3, HC 0.4 g/km.

Other records carrying the same engine code

Other certificate holders whose test vehicle carried the same engine code (10 of 37 shown):

• Zhejiang Taizhou Wangye Power (Usa) Co., Ltd.8ZTWC.050SAA2008 · same engine factory
• Benyate Motorsport LLCTBYMC.049MC12026 · different engine factory
• Benyate Motorsport LLCSBYMC.049MC12025 · different engine factory
• Benyate Motorsport LLCRBYMC.049MC12024 · different engine factory
• Benyate Motorsport LLCPBYMC.049MC12023 · different engine factory
• Benyate Motorsport LLCNBYMC.049MC12022 · different engine factory
• Benzhou (Usa) Vehicle Industry Group Co., Ltd.8BNZC.050SA12008 · different engine factory
• Dafier, Inc.FDFRC.049QQA2015 · different engine factory
• Dafier, Inc.EDFRC.049QQA2014 · different engine factory
• Dafier, Inc.DDFRC.049QQA2013 · different engine factory

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 FWGYC.049WYC

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.

WY50QT-10 · WY50QT-101 · WY50QT-105 · WY50QT-16 · WY50QT-16(II) · WY50QT-16(III) · WY50QT-16(IV) · WY50QT-16(V) · WY50QT-4 · WY50QT-4(III) · WY50QT-4(IV) · WY50QT-41 · WY50QT-53 · WY50QT-55 · WY50QT-58 · WY50QT-6 · WY50QT-7 · WY50QT-7(IV) · WY50QT-7(VI) · WY50QT-79 · WY50QT-86 · WY50QZT-86

Other American badges on engines from the same factory

• Zhejiang Taizhou Wangye Power · 150cc3 American brands · 2007–2017
• Zhejiang Taizhou Wangye Power · 49-50cc3 American brands · 2007–2015