EPA engine family

Engine family 9KNGX.070AAA

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 Haowai Motorcycle Manufacturing Co., Ltd, certified as ATVs.

Displacement: —
Model years: 2009
Models certified: 24
Certificates: 1

What this record says

Sold in the US by: Kangchao Group (Usa), Inc.
Engine built by: Chongqing Haowai Motorcycle Manufacturing Co., Ltd.
Vehicle category: ATVA-Meet EPA & ARB ATV Definition
Certificate numbers: 9KNGX.070AAA-003

What the number itself says

Reading 9KNGX.070AAA left to right: 9 is the model-year letter for 2009, KNG is the three-character code the EPA assigned to Kangchao Group (Usa) as certificate holder, X marks an off-road certification, .070 is the displacement in litres, so 70cc and AAA 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 6 kW (about 8 hp) at 7,500 rpm, driving through a 3-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: 6 kW (≈8 hp)
Rated speed: 7,500 rpm
Transmission: 3-speed manual gearbox
Sales area: 49S
Vehicle built by: Zhejiang Health Ascend Industry Co., Ltd.
Test vehicle model: KCG125

Filing history and where it was sold

Kangchao Group (Usa) filed one certificate under this family, for model year 2009, sold as 49-state (not certified for sale in California).

The vehicle itself is recorded as built by Zhejiang Health Ascend Industry Co., Ltd. in China, while the engine came from Chongqing Haowai Motorcycle Manufacturing Co., Ltd. Chassis parts and engine parts therefore have different origins.

Certified emission levels: CO 21.8, HC 0.39, NOx 0.46 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 2009 this engine drives a manual gearbox, so clutch plates, chain and sprockets wear first — count the sprocket teeth on the KCG125 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 9KNGX.070AAA carries a catalyst, so a replacement silencer without one changes what this engine was certified with.

Models certified under 9KNGX.070AAA

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.

KC50S-18 · KC50S-4 · KC50S-5 · KC50S-6 · KC50S-7 · KC50S-8 · KC50S-9 · KC70S-18 · KC70S-4 · KC70S-5 · KC70S-6 · KC70S-7 · KC70S-8 · KC70S-9 · KCG50 · KCG70 · MTR50 · MTR70 · ODS50 · ODS70 · ZHA50 · ZHA70 · ZTX50 · ZTX70

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.