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The Scooter Parts Registry

EPA engine family

Engine family HEGLX.124LYB

If this code is printed on your emission label, this is your machine's federal record: sold under Egl Motor Inc., with an engine built by Yongkang Eagle Motor Co., Ltd, certified as ATVs.

Displacement
—
Model years
2017
Models certified
21
Certificates
1

What this record says

Sold in the US by
Egl Motor Inc.
Engine built by
Yongkang Eagle Motor Co., Ltd.
Vehicle category
ATVA-Meet EPA & ARB ATV Definition
Certificate numbers
HEGLX.124LYB-002

What the number itself says

Reading HEGLX.124LYB left to right: H is the model-year letter for 2017, EGL is the three-character code the EPA assigned to Egl Motor as certificate holder, X marks an off-road certification, .124 is the displacement in litres, so 124cc and LYB is Egl 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 Egl Motor submitted for this family (model Madix-3) carried engine code 154FMI. In the Chinese engine-model convention that reads as one cylinder with a nominal 54 mm bore, FMI series.

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 "Three Way Catalyst (TWC), single-bed, closed-loop warm up". The head carries a pulse secondary-air (PAIR) valve.

Rated power on the record is 6.1 kW (about 8 hp) at 7,000 rpm, driving through a 4-speed manual gearbox.

Engine code on test vehicle
154FMI
Nominal bore (from the code)
54 mm
Cylinders / valves
1 · 2 per cylinder
Cycle
four-stroke
Fuel delivery
carburettor
Oxygen sensor
no
Engine control
ICM
Catalytic converter
Three Way Catalyst (TWC), single-bed, closed-loop warm up
Air injection
PAIR
Rated power
6.1 kW (≈8 hp)
Rated speed
7,000 rpm
Transmission
4-speed manual gearbox
Sales area
50S
Vehicle built by
Yongkang Eagle Motor Co., Ltd.
Test vehicle model
Madix-3

Filing history and where it was sold

Egl Motor filed one certificate under this family, for model year 2017, sold as 50-state, California included.

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

Certified emission levels: CO 11.8, HC 0.49, HC+NOx 0.5 g/km.

Other records carrying the same engine code

Egl Motor certified an engine with this code under 9 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 (10 of 164 shown):

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 HEGLX.124LYB

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.

Madix-1 · Madix-10 · Madix-11 · Madix-12 · Madix-13 · Madix-14 · Madix-15 · Madix-16 · Madix-17 · Madix-18 · Madix-19 · Madix-2 · Madix-20 · Madix-21 · Madix-3 · Madix-4 · Madix-5 · Madix-6 · Madix-7 · Madix-8 · Madix-9

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.