Engine family THTXC.150DS2

What this record says

Sold in the US by

Hanhwei Technology Inc.

Engine built by

Taizhou Zhilong Technolog Co., Ltd.

Vehicle category

Highway Motorcycle - Ib (50-169cc)

Certificate numbers

THTXC.150DS2-003

What the number itself says

Reading THTXC.150DS2 left to right: T is the model-year letter for 2026, HTX is the three-character code the EPA assigned to Hanhwei Technology as certificate holder, C marks a highway (street-legal) certification, .150 is the displacement in litres, so 150cc and DS2 is Hanhwei Technology'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 Hanhwei Technology submitted for this family (model YY150T-12) carried engine code 1P57QMJ. In the Chinese engine-model convention that reads as one cylinder, horizontal (flat) cylinder, with a nominal 57 mm bore, QMJ series. Against the certified 150cc that implies a stroke of roughly 59 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 "TWC, single bed, open loop". The head carries a pulse secondary-air (PAIR) valve.

Rated power on the record is 6.8 kW (about 9 hp) at 7,500 rpm, driving through a CVT (belt and variator).

Engine code on test vehicle

1P57QMJ

Nominal bore (from the code)

57 mm · implied stroke ≈ 59 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

6.8 kW (≈9 hp)

Rated speed

7,500 rpm

Transmission

CVT (belt and variator)

Sales area

50S

Vehicle built by

GUANGXI DONGSHUN SCI&TECH CO., LTD.

Test vehicle model

YY150T-12

Filing history and where it was sold

Hanhwei Technology filed one certificate under this family, for model year 2026, sold as 50-state, California included.

The vehicle itself is recorded as built by GUANGXI DONGSHUN SCI&TECH CO., LTD. in CHINA, while the engine came from Taizhou Zhilong Technolog Co., Ltd. Chassis parts and engine parts therefore have different origins.

Certified emission levels: CO 3.5, HC 0.3 g/km.

Other records carrying the same engine code

Other certificate holders whose test vehicle carried the same engine code (10 of 81 shown):

• Amstar Motor CorporationM1AMC.150NSY2021 · different engine factory
• Amstar Motor CorporationL1AMC.150NSY2020 · different engine factory
• Amstar Motor CorporationK1AMC.150NSY2019 · different engine factory
• Amstar Motor CorporationH1AMC.150B1P2017 · different engine factory
• Arena Group Inc.TAGXC.149WY12026 · different engine factory
• Boom International Holdings (Usa), Inc.TBMHC.150MTA2026 · different engine factory
• Boom International Holdings (Usa), Inc.SBMHC.150MTA2025 · different engine factory
• Boom International Holdings (Usa), Inc.RBMHC.150MTA2024 · different engine factory
• Boom International Holdings (Usa), Inc.PBMHC.150MTA2023 · different engine factory
• Boom International Holdings (Usa), Inc.NBMHC.150MTA2022 · 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 THTXC.150DS2

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.

ADV-150 · ANGEL3-150 · BWS-150 · CLICK-150 · EAGLE 4 · F9-150 · JCH-150 · JOG-150 · M5-150 · MBK-150 · NMAX-150 · New Vario-150 · Novax-150 · PCX-150 · Q-MAX-150 · RAVIDA-150 · ST-150 · TANK-150