Engine family SJINC.150GWA

What this record says

Sold in the US by

Jinding USA Llc.

Engine built by

Zhejiang Jiajue

Vehicle category

Highway Motorcycle - Ib (50-169cc)

Certificate numbers

SJINC.150GWA-001

What the number itself says

Reading SJINC.150GWA left to right: S is the model-year letter for 2025, JIN is the three-character code the EPA assigned to Jinding USA as certificate holder, C marks a highway (street-legal) certification, .150 is the displacement in litres, so 150cc and GWA is Jinding 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 vehicle Jinding USA submitted for this family (model JJ150T-13) carried engine code JJ157QMJ. In the Chinese engine-model convention that reads as one cylinder with a nominal 57 mm bore, QMJ series. Against the certified 150cc that implies a stroke of roughly 59 mm — a sanity check for a piston or cylinder listing, not a published figure.

The certificate describes a four-stroke, single-cylinder engine with 2 valves per cylinder fed by carburettor. 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).

Engine code on test vehicle

JJ157QMJ

Nominal bore (from the code)

57 mm · implied stroke ≈ 59 mm

Cylinders / valves

1 · 2 per cylinder

Cycle

four-stroke

Fuel delivery

carburettor

Oxygen sensor

no

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

49S

Vehicle built by

Zhejiang Jiajue Motorcycle Manufacturing Co.,Ltd

Test vehicle model

JJ150T-13

Filing history and where it was sold

Jinding USA filed one certificate under this family, for model year 2025, sold as 49-state (not certified for sale in California).

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

Certified emission levels: CO 5.5, HC 0.2 g/km.

Other records carrying the same engine code

Jinding USA certified an engine with this code under 7 other family numbers — the same engine filed again in another year, or in an off-road and a street version:

• JJINC.150GWA (2018)
• KJINC.150GWA (2019)
• LJINC.150GWA (2020)
• MJINC.150GWA (2021)
• NJINC.150GWA (2022)
• PJINC.150GWA (2023)
• RJINC.150GWA (2024)

Other certificate holders whose test vehicle carried the same engine code (10 of 15 shown):

• Jiajue U.S.A. LLCHJAJC0.15S4A2017 · same engine factory
• Jiajue U.S.A. LLCGJAJC0.15S4A2016 · same engine factory
• Jiajue U.S.A. LLCFJAJC0.15S4A2015 · same engine factory
• Qlink-Keeway America, LLC Dba Qbk MotorsDQNKC0.15JJ12013 · same engine factory
• Qlink-Keeway America, LLC Dba Qbk MotorsCQNKC0.15JJ12012 · same engine factory
• Qlink-Keeway America, LLC Dba Qbk MotorsBQNKC0.15JJ12011 · same engine factory
• Qlink-Keeway America, LLC Dba Qbk MotorsAQNKC0.15JJ12010 · same engine factory
• Qlink-Keeway America, LLC Dba Qbk Motors9QNKC0.15JJ12009 · same engine factory
• Flywing Motor American Co.,LtdTFMAC.150MCA2026 · different engine factory
• Flywing Motor American Co.,LtdTFMAC.150MCB2026 · different engine factory

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 SJINC.150GWA

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.

JJ150T-10 · JJ150T-13 · JJ150T-15 · JJ150T-16 · JJ150T-16A · JJ150T-16B · JJ150T-16C · JJ150T-23B · JJ150T-4 · JJ150T-40 · JJ150T-5 · JJ150T-7 · JJ150T-8 · JJ150T-8A · JJ150T-A

Other American badges on engines from the same factory

• Zhejiang Jiajue · 150cc4 American brands · 2009–2025