Engine family THTXC.169DS3

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.169DS3-002

What the number itself says

Reading THTXC.169DS3 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, .169 is the displacement in litres, so 169cc and DS3 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 YY200T-9A) carried engine code 1P61QMK-A. In the Chinese engine-model convention that reads as one cylinder, horizontal (flat) cylinder, with a nominal 61 mm bore, QMK series. Against the certified 169cc that implies a stroke of roughly 58 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". The head carries a pulse secondary-air (PAIR) valve.

Rated power on the record is 7.5 kW (about 10 hp) at 7,500 rpm, driving through a CVT (belt and variator).

Engine code on test vehicle

1P61QMK-A

Nominal bore (from the code)

61 mm · implied stroke ≈ 58 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

Air injection

PAIR

Rated power

7.5 kW (≈10 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

YY200T-9A

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 3.4, HC 0.3 g/km.

Other records carrying the same engine code

Other certificate holders whose test vehicle carried the same engine code:

• Baida Motors Inc.TBAIC.169JY12026 · different engine factory
• Gst Motor LLCTGSTC.169MCC2026 · different engine factory
• Gst Motor LLCSGSTC.169MCB2025 · different engine factory
• Gst Motor LLCSGSTC.169MCC2025 · different engine factory
• Gst Motor LLCRGSTC.169MCB2024 · 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.169DS3

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-200 · ANGEL 3-200 · BWS-200 · CLICK-200 · EAGLE 4 · F9-200 · JCH-200 · M5-200 · MBK-200 · NMAX-200 · New Vario-200 · Novax-200 · OG-200 · PCX-200 · Q-MAX-200 · RAVIDA-200 · ST-200 · TANK-200