Engine family 7KNGX.250AMA

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.250AMA-002-R01

What the number itself says

Reading 7KNGX.250AMA 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, .250 is the displacement in litres, so 250cc and AMA 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 11 kW (about 15 hp) at 6,500 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

11 kW (≈15 hp)

Rated speed

6,500 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 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 9.0, HC 0.69, NOx 0.17 g/km.

Models certified under 7KNGX.250AMA

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 · BS200S-10 · BS200S-2 · BS200S-2C · BS200S-3 · BS200S-3A · BS200S-5 · BS200S-9 · BS250S-2 · BS250S-4 · BS250S-5 · BS250S-6 · BS250S-7 · Tank TK250S · Tank TK250S-2 · Tank TK250S-4 · Tank TK250S-5 · Tank TK250S-6 · Tank TK250S-7 · Tank TK250S-9

Other American badges on engines from the same factory

• Chongqing Loncin · 150cc5 American brands · 2006–2008