EPA engine family

Engine family 8LNCX0.25LTF

If this code is printed on your emission label, this is your machine's federal record: sold under Loncin (Usa) Inc., with an engine built by Chongqing Loncin, certified as ATVs.

Displacement: —
Model years: 2008
Models certified: 25
Certificates: 1

What this record says

Sold in the US by: Loncin (Usa) Inc.
Engine built by: Chongqing Loncin
Vehicle category: ATVA-Meet EPA & ARB ATV Definition
Certificate numbers: 8LNCX0.25LTF-003

The engine, as described on the certificate

The test vehicle Loncin (Usa) submitted for this family (model Cyber250) carried engine code LC171FMM. In the Chinese engine-model convention that reads as one cylinder with a nominal 71 mm bore, FMM 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 "TWC, single bed, open loop". The head carries a pulse secondary-air (PAIR) valve.

Rated power on the record is 9.5 kW (about 13 hp) at 6,500 rpm, driving through a 5-speed manual gearbox.

Engine code on test vehicle: LC171FMM
Nominal bore (from the code): 71 mm
Cylinders / valves: 1 · 2 per cylinder
Cycle: four-stroke
Fuel delivery: carburettor
Oxygen sensor: no
Engine control: ICM
Catalytic converter: TWC, single bed, open loop
Air injection: PAIR
Rated power: 9.5 kW (≈13 hp)
Rated speed: 6,500 rpm
Transmission: 5-speed manual gearbox
Sales area: 50S
Vehicle built by: Chongqing Loncin Motor Co., Ltd.
Test vehicle model: Cyber250

Filing history and where it was sold

Loncin (Usa) filed one certificate under this family, for model year 2008, sold as 50-state, California included.

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

Certified emission levels: CO 6.3, HC 0.20, NOx 0.24 g/km.

What this configuration means when you shop for parts

Loncin (Usa) certified the LC171FMM with a carburettor, so the fuel-side wear items are the carburettor, its jets and float needle, the intake boot and the choke. The 71 mm bore in the code gives the engine size, not the carburettor size — measure the intake bore and the mounting on the LC171FMM before ordering.

Loncin (Usa)'s 2008 the LC171FMM drives a manual gearbox, so clutch plates, chain and sprockets wear first — count the sprocket teeth on the Cyber250 before buying a chain.

The PAIR valve Loncin (Usa) lists on the LC171FMM is an emissions part; its hoses perish and are the usual cause of popping on the overrun.

The exhaust on Loncin (Usa)'s 8LNCX0.25LTF carries a catalyst, so a replacement silencer without one changes what the LC171FMM was certified with.

Models certified under 8LNCX0.25LTF

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.

Avalanche250 · BMS200 · BMS250 · Baja 200 · Baja Wilderness 250 · Baja Wilderness 250U · Crossrunner200 · Crossrunner250 · Jackel200 · Jackel250 · Kmax200 · Kmax250 · LS200 · LS250 · LTmotor200 · LTmotor250 · LX200 · LX250 · Lightening200 · MCR200 · MCR250 · Shinima200 · Shinima250 · Xrider200 · Xrider250

Other American badges on engines from the same factory

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.