Engine family FMFGX.124LYB

What this record says

Sold in the US by

Mfg Powersports

Engine built by

Yongkang Lingying Electric Appliance Co., Ltd.

Vehicle category

All Terrain Vehicle

Certificate numbers

FMFGX.124LYB-002

What the number itself says

Reading FMFGX.124LYB left to right: F is the model-year letter for 2015, 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". Secondary air injection is fitted.

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

AIR

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 2015, 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:

• GMFGX.124LYB (2016)

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 FMFGX.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