EPA engine family

Engine family 7AMJC.150JJT

If this code is printed on your emission label, this is your machine's federal record: sold under American Jiajue, with an engine built by Chongqing Loncin, certified as street-legal scooters and motorcycles.

Displacement: —
Model years: 2007
Models certified: 15
Certificates: 1

What this record says

Sold in the US by: American Jiajue
Engine built by: Chongqing Loncin
Vehicle category: Highway Motorcycle - Ib (50-169cc)
Certificate numbers: 7AMJC.150JJT-001

What the number itself says

Reading 7AMJC.150JJT left to right: 7 is the model-year letter for 2007, AMJ is the three-character code the EPA assigned to American Jiajue as certificate holder, C marks a highway (street-legal) certification, .150 is the displacement in litres, so 150cc and JJT is American Jiajue'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 5.8 kW (about 8 hp) at 7,000 rpm, driving through a CVT (belt and variator).

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: 5.8 kW (≈8 hp)
Rated speed: 7,000 rpm
Transmission: CVT (belt and variator)
Sales area: 50S
Vehicle built by: Zhejiang Jiajue Motorcycle Manufacturing Co. Ltd.
Test vehicle model: JJ150T

Filing history and where it was sold

American Jiajue filed one certificate under this family, for model year 2007, sold as 50-state, California included.

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

Certified emission levels: CO 1.9, HC 0.47, NOx 0.32 g/km.

What this configuration means when you shop for parts

American Jiajue 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.

The CVT behind this engine makes its drive belt, variator rollers and clutch shoes the consumables, so measure the old belt on the JJ150T rather than ordering by displacement.

The PAIR valve American Jiajue lists on this engine is an emissions part; its hoses perish and are the usual cause of popping on the overrun.

The exhaust on American Jiajue's 7AMJC.150JJT carries a catalyst, so a replacement silencer without one changes what this engine was certified with.

Models certified under 7AMJC.150JJT

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.

JJ125T · JJ125T-2 · JJ125T-3 · JJ150T · JJ150T-15 · JJ150T-2 · JJ150T-21 · JJ150T-3 · JJ150T-4 · JJ150T-4A · JJ150T-5 · JJ150T-6 · JJ150T-7 · JJ150T-8 · JJ150T-9

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.