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The Scooter Parts Registry

EPA engine family

Engine family PBYMC.049MC1

If this code is printed on your emission label, this is your machine's federal record: sold under Benyate Motorsport LLC, with an engine built by Taizhou Qianxin Vehicle Co,.Ltd, certified as street-legal scooters and motorcycles.

Displacement
49cc
Model years
2023
Models certified
20
Certificates
1

What this record says

Sold in the US by
Benyate Motorsport LLC
Engine built by
Taizhou Qianxin Vehicle Co,.Ltd
Vehicle category
Highway Motorcycle - Ia (<50cc)
Certificate numbers
PBYMC.049MC1-003

What the number itself says

Reading PBYMC.049MC1 left to right: P is the model-year letter for 2023, BYM is the three-character code the EPA assigned to Benyate Motorsport as certificate holder, C marks a highway (street-legal) certification, .049 is the displacement in litres, so 49cc and MC1 is Benyate Motorsport'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 Benyate Motorsport submitted for this family (model FY50QT-3) carried engine code 139QMB. 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. No catalytic converter is listed. The head carries a pulse secondary-air (PAIR) valve.

Rated power on the record is 2.4 kW (about 3 hp) at 8,000 rpm, driving through a CVT (belt and variator).

Engine code on test vehicle
139QMB
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
none listed
Air injection
PAIR
Rated power
2.4 kW (≈3 hp)
Rated speed
8,000 rpm
Transmission
CVT (belt and variator)
Sales area
49S
Vehicle built by
Taizhou Qianxin Vehicle Co,.Ltd
Test vehicle model
FY50QT-3

Filing history and where it was sold

Benyate Motorsport filed one certificate under this family, for model year 2023, sold as 49-state (not certified for sale in California).

The vehicle itself is recorded as built by the same company, Taizhou Qianxin Vehicle Co,.Ltd in China — engine and chassis from one source.

Certified emission levels: CO 4.1, HC 0.5 g/km.

Other records carrying the same engine code

Benyate Motorsport 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:

Other certificate holders whose test vehicle carried the same engine code (10 of 33 shown):

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 PBYMC.049MC1

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.

BWS · CLASSIC X · COCO · DELIVERY · DRAGON · EFSANE · F1 · FLASH · G1 · JIGGER · M16 · RCT · RED FOX · ROMA · ROSSI · ROSSI RS · SUNNY · SUNNY X · TANK · YESTERDAY

Other American badges on engines from the same factory

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.