EPA engine family

Engine family 7KNGX.200AMW

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

Displacement: —
Model years: 2007
Models certified: 21
Certificates: 1

What this record says

Sold in the US by: Kangchao Group (Usa), Inc.
Engine built by: Chongqing Loncin
Vehicle category: ATVA-Meet EPA & ARB ATV Definition
Certificate numbers: 7KNGX.200AMW-003-R01

What the number itself says

Reading 7KNGX.200AMW left to right: 7 is the model-year letter for 2007, KNG is the three-character code the EPA assigned to Kangchao Group (Usa) as certificate holder, X marks an off-road certification, .200 is the displacement in litres, so 200cc and AMW is Kangchao Group (Usa)'s 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 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 10.8 kW (about 14 hp) at 8,000 rpm, driving through a 5-speed manual gearbox.

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: 10.8 kW (≈14 hp)
Rated speed: 8,000 rpm
Transmission: 5-speed manual gearbox
Sales area: 50S
Vehicle built by: Chongqing Astronautic Bashan Motorcycle Manufacturing Co., Ltd.
Test vehicle model: BS200S-6A

Filing history and where it was sold

Kangchao Group (Usa) filed one certificate under this family, for model year 2007, sold as 50-state, California included.

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

Certified emission levels: CO 2.1, HC 0.31, NOx 0.28 g/km.

What this configuration means when you shop for parts

Kangchao Group (Usa) certified this engine with a carburettor, so the fuel-side wear items are the carburettor, its jets and float needle, the intake boot and the choke. The record gives no carburettor part number — measure the intake bore and the mounting on this engine before ordering.

Kangchao Group (Usa)'s 2007 this engine drives a manual gearbox, so clutch plates, chain and sprockets wear first — count the sprocket teeth on the BS200S-6A before buying a chain.

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

The exhaust on Kangchao Group (Usa)'s 7KNGX.200AMW carries a catalyst, so a replacement silencer without one changes what this engine was certified with.

Models certified under 7KNGX.200AMW

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.

BS200S-2B · BS200S-4 · BS200S-6 · BS200S-6A · BS250S-11 · BS250S-13 · BS250S-14 · BS250S-15 · BS250S-16 · BS250S-17 · BS250S-18 · BS250S-19 · BS250S-20 · BS250S-9A · Tank TK200S-2B · Tank TK200S-4 · Tank TK200S-6 · Tank TK200S-6A · Tank TK200S-6B · Tank TK200S-FA · Tank TK200S-FB

Other American badges on engines from the same factory

Chongqing Loncin · 150cc5 American brands · 2006–2008

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.