Engine family GMFGX.124LYB

What this record says

Sold in the US by

Mfg Powersports

Engine built by

Yongkang Lingying Electric Appliance Co., Ltd.

Vehicle category

ATVA-Meet EPA & ARB ATV Definition

Certificate numbers

GMFGX.124LYB-001

What the number itself says

Reading GMFGX.124LYB left to right: G is the model-year letter for 2016, MFG is the three-character code the EPA assigned to Mfg Powersports as certificate holder, X marks an off-road certification, .124 is the displacement in litres, so 124cc and LYB is Mfg Powersports' 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 Mfg Powersports 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 Lingying Electric Appliance Co., Ltd.

Test vehicle model

Madix-3

Filing history and where it was sold

Mfg Powersports filed one certificate under this family, for model year 2016, sold as 50-state, California included.

The vehicle itself is recorded as built by the same company, Yongkang Lingying Electric Appliance 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

Mfg Powersports 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:

• FMFGX.124LYB (2015)

Other certificate holders whose test vehicle carried the same engine code (10 of 172 shown):

• Ace Powersports Inc.TACEX.124JYA2026 · different engine factory
• Ace Powersports Inc.SACEX.124JYA2025 · different engine factory
• Ace Powersports Inc.RACEX.124JYA2024 · different engine factory
• Ace Powersports Inc.PACEX.124JYA2023 · different engine factory
• Ace Powersports Inc.NACEX.124JYA2022 · different engine factory
• Ace Powersports Inc.MACEX.124JYA2021 · different engine factory
• Ace Powersports Inc.LACEX.124JYA2020 · different engine factory
• Ace Powersports Inc.KACEX.124JYA2019 · different engine factory
• Apollo Motorsports Usa, Inc.LAPSX.124VA12020 · different engine factory
• Apollo Motorsports Usa, Inc.LAPSX.124BLC2020 · 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 GMFGX.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-3 · Madix-4 · Madix-5 · Madix-6 · Madix-7 · Madix-8 · Madix-9