EPA engine family

Engine family SGSTC.169MCB

If this code is printed on your emission label, this is your machine's federal record: sold under Gst Motor LLC, with an engine built by Taizhou Zhilong Technology Co.,Ltd, certified as street-legal scooters and motorcycles.

Displacement: —
Model years: 2025
Models certified: 30
Certificates: 1

What this record says

Sold in the US by: Gst Motor LLC
Engine built by: Taizhou Zhilong Technology Co.,Ltd
Vehicle category: Highway Motorcycle - Ib (50-169cc)
Certificate numbers: SGSTC.169MCB-003-R02

What the number itself says

Reading SGSTC.169MCB left to right: S is the model-year letter for 2025, GST is the three-character code the EPA assigned to Gst Motor as certificate holder, C marks a highway (street-legal) certification, .169 is the displacement in litres, so 169cc and MCB is Gst Motor'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 Gst Motor submitted for this family (model ZL200T-2) 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.

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 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
Cylinders / valves: 1 · 2 per cylinder
Cycle: four-stroke
Fuel delivery: carburettor
Oxygen sensor: no
Engine control: other
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: Taizhou Zhilong Technology Co.,Ltd.
Test vehicle model: ZL200T-2

Filing history and where it was sold

Gst Motor filed one certificate under this family, for model year 2025, sold as 50-state, California included.

The vehicle itself is recorded as built by the same company, Taizhou Zhilong Technology Co.,Ltd. in China — engine and chassis from one source.

Certified emission levels: CO 6.4, HC 0.3 g/km.

What this configuration means when you shop for parts

Gst Motor certified the 1P61QMK-A with a carburettor, so the fuel-side wear items are the carburettor, its jets and float needle, the intake boot and the choke. The 61 mm bore in the code gives the engine size, not the carburettor size — measure the intake bore and the mounting on the 1P61QMK-A before ordering.

The CVT behind the 1P61QMK-A makes its drive belt, variator rollers and clutch shoes the consumables, so measure the old belt on the ZL200T-2 rather than ordering by displacement.

The PAIR valve Gst Motor lists on the 1P61QMK-A is an emissions part; its hoses perish and are the usual cause of popping on the overrun.

The exhaust on Gst Motor's SGSTC.169MCB carries a catalyst, so a replacement silencer without one changes what the 1P61QMK-A was certified with.

Other records carrying the same engine code

Gst Motor certified an engine with this code under 3 other family numbers — the same engine filed again in another year, or in an off-road and a street version:

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

Baida Motors Inc.TBAIC.169JY12026 · different engine factory
Hanhwei Technology Inc.THTXC.169DS32026 · 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 SGSTC.169MCB

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 · ADV-200 · ANGEL 3-150 · ANGEL 3-200 · BWS-150 · BWS-200 · CLICK-150 · CLICK-200 · EAGLE 4-150 · EAGLE 4-200 · JCH-150 · JCH-200 · M5-150 · M5-200 · NMAX-150 · NMAX-200 · New Vario-150 · New Vario-200 · Novax-150 · Novax-200 · PCX-150 · PCX-200 · Q-MAX-150 · Q-MAX-200 · RAVIDA-150 · RAVIDA-200 · ST-150 · ST-200 · TANK-150 · TANK-200

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.