Engine family 8ZNNC.050SA1

What this record says

Sold in the US by

ZNEN Power Sports, Inc.

Engine built by

Taizhou Zhongneng (ZNEN)

Vehicle category

Highway Motorcycle - Ia (<50cc)

Certificate numbers

8ZNNC.050SA1-003

What the number itself says

Reading 8ZNNC.050SA1 left to right: 8 is the model-year letter for 2008, ZNN is the three-character code the EPA assigned to ZNEN Power Sports as certificate holder, C marks a highway (street-legal) certification, .050 is the displacement in litres, so 50cc and SA1 is ZNEN Power Sports' 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 vehicles ZNEN Power Sports submitted for this family carried engine codes BN139QMB and BN157QMJ. 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, run by an ignition control module (CDI-type ignition). There is a catalytic converter in the exhaust, recorded as "TWC, single bed, open loop".

Rated power on the record is 2–6.2 kW (about 3–8 hp) at 7,000 rpm, driving through an automatic.

Engine code on test vehicle

BN139QMB, BN157QMJ

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

Engine control

ICM

Catalytic converter

TWC, single bed, open loop

Rated power

2–6.2 kW

Rated speed

7,000 rpm

Transmission

automatic

Sales area

49S

Vehicle built by

Zhejiang Zhongneng Industry Group Co., Ltd.

Test vehicle model

Lance Venice 150

Filing history and where it was sold

ZNEN Power Sports filed one certificate under this family, for model year 2008, sold as 49-state (not certified for sale in California).

The vehicle itself is recorded as built by Zhejiang Zhongneng Industry Group Co., Ltd. in China, while the engine came from Taizhou Zhongneng (ZNEN). Chassis parts and engine parts therefore have different origins.

Certified emission levels: CO 9.5, HC 0.92, NOx 0.27 g/km.

Other records carrying the same engine code

ZNEN Power Sports certified an engine with this code under one other family number — the same engine filed again in another year, or in an off-road and a street version:

• 8ZNNC.150SA1 (2008)

Other certificate holders whose test vehicle carried the same engine code (10 of 124 shown):

• AA Powersports Inc.9ASRC0.15ZNE2009 · same engine factory
• Amstar Motors LLCTAMSC.049MCA2026 · same engine factory
• Amstar Motors LLCSAMSC.049MC12025 · same engine factory
• Amstar Motors LLCSAMSC.049MCA2025 · same engine factory
• Amstar Motors LLCRAMSC.049MC12024 · same engine factory
• Amstar Motors LLCPAMSC.049MC12023 · same engine factory
• Amstar Motors LLCNAMSC.049MC12022 · same engine factory
• Amstar Motors LLCMAMSC.049MC12021 · same engine factory
• Amstar Motors LLCLAMSC.049MC12020 · same engine factory
• Amstar Motors LLCKAMSC.049MC12019 · same 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 8ZNNC.050SA1

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.

Il Bello · LANCE CHARMING 50 · LANCE GTR 50 · Land Scooter ZN50QT-12 · Tomberlin RCX50 · ZN50QT · ZN50QT-11 · ZN50QT-12 · ZN50QT-15 · ZN50QT-20 · ZN50QT-6 · ZN50QT-8 · ZN50QT-8C · ZN50QT-9 · ZN50QT-E

Other American badges on engines from the same factory

• Taizhou Zhongneng (ZNEN) · 49-50cc17 American brands · 2008–2026