EPA engine family

Engine family LAMIC0.15YF1

If this code is printed on your emission label, this is your machine's federal record: sold under Amigo Motorsports, Inc, with an engine built by Sanmen County Yongfu Machine Co,.Ltd, certified as street-legal scooters and motorcycles.

Displacement: 150cc
Model years: 2020
Models certified: 16
Certificates: 1

What this record says

Sold in the US by: Amigo Motorsports, Inc
Engine built by: Sanmen County Yongfu Machine Co,.Ltd
Vehicle category: Highway Motorcycle - Ib (50-169cc)
Certificate numbers: LAMIC0.15YF1-002

The engine, as described on the certificate

The test vehicle Amigo Motorsports submitted for this family (model YN150T-4) carried engine code YN1P57QMJ. In the Chinese engine-model convention that reads as one cylinder, horizontal (flat) cylinder, with a nominal 57 mm bore, QMJ series. Against the certified 150cc that implies a stroke of roughly 59 mm — a sanity check for a piston or cylinder listing, not a published figure.

The certificate describes a four-stroke, single-cylinder engine with 2 valves per cylinder fed by carburettor. There is a catalytic converter in the exhaust, recorded as "TWC, single bed, open loop". The head carries a pulse secondary-air (PAIR) valve.

Rated power on the record is 6.5 kW (about 9 hp) at 7,500 rpm, driving through a CVT (belt and variator).

Engine code on test vehicle: YN1P57QMJ
Nominal bore (from the code): 57 mm · implied stroke ≈ 59 mm
Cylinders / valves: 1 · 2 per cylinder
Cycle: four-stroke
Fuel delivery: carburettor
Oxygen sensor: no
Engine control: other
Catalytic converter: TWC, single bed, open loop
Air injection: PAIR
Rated power: 6.5 kW (≈9 hp)
Rated speed: 7,500 rpm
Transmission: CVT (belt and variator)
Sales area: 50S
Vehicle built by: Sanmen County Yongfu Machine Co,.Ltd
Test vehicle model: YN150T-4

Filing history and where it was sold

Amigo Motorsports filed one certificate under this family, for model year 2020, sold as 50-state, California included.

The vehicle itself is recorded as built by the same company, Sanmen County Yongfu Machine Co,.Ltd in China — engine and chassis from one source.

Certified emission levels: CO 2.7, HC 0.2 g/km.

What this configuration means when you shop for parts

Amigo Motorsports certified the YN1P57QMJ with a carburettor at 150cc, so the fuel-side wear items are the carburettor, its jets and float needle, the intake boot and the choke. The 57 mm bore in the code gives the engine size, not the carburettor size — measure the intake bore and the mounting on the YN1P57QMJ before ordering.

The CVT behind the YN1P57QMJ makes its drive belt, variator rollers and clutch shoes the consumables; belt length and width vary between 150cc machines, so measure the old belt on the YN150T-4 rather than ordering by displacement.

The PAIR valve Amigo Motorsports lists on the YN1P57QMJ is an emissions part; its hoses perish and are the usual cause of popping on the overrun.

The exhaust on Amigo Motorsports' LAMIC0.15YF1 carries a catalyst, so a replacement silencer without one changes what the YN1P57QMJ was certified with.

Other records carrying the same engine code

Amigo Motorsports certified an engine with this code under 3 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 11 shown):

Yuluo Global Motor, Inc.SYGMC0.15MC12025 · same engine factory
Yuluo Global Motor, Inc.RYGMC0.15MC12024 · same engine factory
Yuluo Global Motor, Inc.PYGMC0.15MC12023 · same engine factory
Yuluo Global Motor, Inc.NYGMC0.15MC12022 · same engine factory
Yuluo Global Motor, Inc.MYGMC0.15MC12021 · same engine factory
Yuluo Global Motor, Inc.LYGMC0.15MC12020 · same engine factory
Yuluo Global Motor, Inc.KYGMC0.15MC12019 · same engine factory
Yuluo Global Motor, Inc.JYGMC0.15MC12018 · same engine factory
Yuluo Global Motor, Inc.HYGMC0.15MC12017 · same engine factory
Yuluo Global Motor, Inc.GYGMC0.15MC12016 · same 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 LAMIC0.15YF1

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.

Avenza Classic 150 · Bellagio Classic 150 · Bello Classic 150 · Boxer 150 · Cruze 150 · Executive Limited 150 · Jax Sport 150 · Largo 150 · Phenom · Polo 150 · Rambo 150 · Rover 150 · SS-150 · Spyker 150 · Swift-S 150 · Warrior 150

Other American badges on engines from the same factory

Sanmen County Yongfu Machine Co,.Ltd · 150cc2 American brands · 2015–2025

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.