Engine family SSNGX.124AT1

What this record says

Sold in the US by

Suyang Sports Llc.

Engine built by

Yongkang Suyang Vehicle Co., Ltd.

Vehicle category

ATVA-Meet EPA & ARB ATV Definition

Certificate numbers

SSNGX.124AT1-001

What the number itself says

Reading SSNGX.124AT1 left to right: S is the model-year letter for 2025, SNG is the three-character code the EPA assigned to Suyang Sports as certificate holder, X marks an off-road certification, .124 is the displacement in litres, so 124cc and AT1 is Suyang Sports' 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 Suyang Sports submitted for this family (model SY125-A-01) 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. No catalytic converter is listed.

Rated power on the record is 6 kW (about 8 hp) at 7,500 rpm, driving through a 3-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

other

Catalytic converter

none listed

Rated power

6 kW (≈8 hp)

Rated speed

7,500 rpm

Transmission

3-speed manual gearbox

Sales area

49S

Vehicle built by

Yongkang Suyang Vehicle Co., Ltd.

Test vehicle model

SY125-A-01

Filing history and where it was sold

Suyang Sports filed one certificate under this family, for model year 2025, sold as 49-state (not certified for sale in California).

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

Certified emission levels: CO 4.6, HC+NOx 1.0 g/km.

Other records carrying the same engine code

Suyang Sports certified an engine with this code under 2 other family numbers — the same engine filed again in another year, or in an off-road and a street version:

• RSNGX.124AT1 (2024)
• TSNGX.124AT1 (2026)

Other certificate holders whose test vehicle carried the same engine code (10 of 171 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 SSNGX.124AT1

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.

SY110-A-01 · SY110-B-01 · SY110-C-01 · SY110-GR-A01 · SY125-A-01 · SY125-B-01 · SY125-C-01 · SY125-F1-A01 · SY125-GC-A01 · SY125-GJ-A01 · SY125-GJ-B01 · SY125-GL-A01 · SY125-S-01A · SY125-S-03A · SY125-S-05A · SY125-S-06A · SY125-Y-01A · SY125-Y-02A