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The Scooter Parts Registry

EPA engine family

Engine family NACEX.124JYA

If this code is printed on your emission label, this is your machine's federal record: sold under Ace Powersports Inc., with an engine built by Yongkang Jiayue Industry & Trading Co., Ltd.

Displacement
—
Model years
2022
Models certified
21
Certificates
1

What this record says

Sold in the US by
Ace Powersports Inc.
Engine built by
Yongkang Jiayue Industry & Trading Co., Ltd
Vehicle category
All Terrain Vehicle
Certificate numbers
NACEX.124JYA-001

What the number itself says

Reading NACEX.124JYA left to right: N is the model-year letter for 2022, ACE is the three-character code the EPA assigned to Ace Powersports as certificate holder, X marks an off-road certification, .124 is the displacement in litres, so 124cc and JYA is Ace 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 Ace Powersports submitted for this family (model M125P) 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 6.1 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
other
Catalytic converter
none listed
Rated power
6.1 kW (≈8 hp)
Rated speed
7,000 rpm
Transmission
4-speed manual gearbox
Sales area
49S
Vehicle built by
Yongkang Jiayue Industry & Trading Co., Ltd.
Test vehicle model
M125P

Filing history and where it was sold

Ace Powersports filed one certificate under this family, for model year 2022, sold as 49-state (not certified for sale in California).

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

Certified emission levels: CO 3.9, HC 0.7, HC+NOx 1.2 g/km.

Other records carrying the same engine code

Ace Powersports certified an engine with this code under 7 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 166 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 NACEX.124JYA

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.

B125 · C125 · D110 · G125 · G125A · G125B · J125 · K125 · M110 · M110-1 · M125 · M125P · N110 · P110 · P125 · R110 · R125 · T125 · TH125 · Y110 · Y125

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.