Engine family JYGMC.049MC2

What this record says

Sold in the US by

Yuluo Global Motor, Inc.

Engine built by

Sanmen County Yongfu Machine Co,.Ltd

Vehicle category

Highway Motorcycle - Ia (<50cc)

Certificate numbers

JYGMC.049MC2-002

What the number itself says

Reading JYGMC.049MC2 left to right: J is the model-year letter for 2018, YGM is the three-character code the EPA assigned to Yuluo Global Motor as certificate holder, C marks a highway (street-legal) certification, .049 is the displacement in litres, so 49cc and MC2 is Yuluo Global Motor'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 Yuluo Global Motor submitted for this family (model YN50QT-8) carried engine code YN139QMB. In the Chinese engine-model convention that reads as one cylinder with a nominal 39 mm bore, QMB series. Against the certified 49cc that implies a stroke of roughly 41 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 2.4 kW (about 3 hp) at 7,500 rpm, driving through a CVT (belt and variator).

Engine code on test vehicle

YN139QMB

Nominal bore (from the code)

39 mm · implied stroke ≈ 41 mm

Cylinders / valves

1 · 2 per cylinder

Cycle

four-stroke

Fuel delivery

carburettor

Oxygen sensor

no

Engine control

other

Catalytic converter

TWC, single bed, open loop

Air injection

PAIR

Rated power

2.4 kW (≈3 hp)

Rated speed

7,500 rpm

Transmission

CVT (belt and variator)

Sales area

49S

Vehicle built by

Sanmen County Yongfu Machine Co,.Ltd

Test vehicle model

YN50QT-8

Filing history and where it was sold

Yuluo Global Motor filed one certificate under this family, for model year 2018, sold as 49-state (not certified for sale in California).

The vehicle itself is recorded as built by the same company, Sanmen County Yongfu Machine Co,.Ltd in China — engine and chassis from one source.

Certified emission levels: CO 4.4, HC 0.6 g/km.

Other records carrying the same engine code

Yuluo Global Motor 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:

• KYGMC.049MC2 (2019)
• LYGMC.049MC2 (2020)
• MYGMC.049MC2 (2021)
• NYGMC.049MC2 (2022)
• PYGMC.049MC2 (2023)
• RYGMC.049MC2 (2024)
• SYGMC.049MC2 (2025)

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 JYGMC.049MC2

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.

Adventure · Agility C · BWS · Diana · Dragon · Force · Grizzy · NEO · New Star · RT · Raptor E · Shark · Sword man · Unicorn · Victoria · Zuma

Other American badges on engines from the same factory

• Sanmen County Yongfu Machine Co,.Ltd · 150cc2 American brands · 2015–2025