Engine family 9KNGX.250AML

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.250AML-004

What the number itself says

Reading 9KNGX.250AML 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, .250 is the displacement in litres, so 250cc and AML 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 test vehicles Kangchao Group (Usa) submitted for this family carried engine codes BAS230B and BAS274L. In the Chinese engine-model convention that reads as 2 cylinders with a nominal 30 mm bore, B 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 11–13 kW (about 15–17 hp) at 6,500–7,000 rpm, driving through a 5-speed manual gearbox.

Engine code on test vehicle

BAS230B, BAS274L

Nominal bore (from the code)

30 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

11–13 kW

Rated speed

6,500–7,000 rpm

Transmission

5-speed manual gearbox

Sales area

50S

Vehicle built by

Chongqing Astronautic Bashan Motorcycle Manufacturing Co., Ltd.

Test vehicle model

BS250S-2

Filing history and where it was sold

Kangchao Group (Usa) filed one certificate under this family, for model year 2009, 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 4.3, HC 0.67, NOx 0.41 g/km.

Other records carrying the same engine code

Kangchao Group (Usa) certified an engine with this code under 4 other family numbers — the same engine filed again in another year, or in an off-road and a street version:

• 8KNGX.250AMA (2008)
• 8KNGX.250AML (2008)
• 8KNGX.300ACA (2008)
• 8KNGX.300AML (2008)

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 9KNGX.250AML

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