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The Scooter Parts Registry

EPA engine family

Engine family RBYMC.223MCA

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 Chongqing Zongshen, certified as street-legal scooters and motorcycles.

Displacement
223cc
Model years
2024
Models certified
16
Certificates
1

What this record says

Sold in the US by
Benyate Motorsport LLC
Engine built by
Chongqing Zongshen
Vehicle category
Highway Motorcycle - II (170-279cc)
Certificate numbers
RBYMC.223MCA-004

What the number itself says

Reading RBYMC.223MCA left to right: R is the model-year letter for 2024, BYM is the three-character code the EPA assigned to Benyate Motorsport as certificate holder, C marks a highway (street-legal) certification, .223 is the displacement in litres, so 223cc and MCA 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 FY250-4) carried engine code 165FMM. In the Chinese engine-model convention that reads as one cylinder with a nominal 65 mm bore, FMM series. Against the certified 223cc that implies a stroke of roughly 67 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 throttle-body fuel injection, with an oxygen sensor for closed-loop fuelling, run by an engine control module (ECM). No catalytic converter is listed.

Rated power on the record is 11.5 kW (about 15 hp) at 7,500 rpm, driving through a 6-speed manual gearbox.

Engine code on test vehicle
165FMM
Nominal bore (from the code)
65 mm · implied stroke ≈ 67 mm
Cylinders / valves
1 · 2 per cylinder
Cycle
four-stroke
Fuel delivery
throttle-body fuel injection
Oxygen sensor
yes (closed loop)
Engine control
ECM
Catalytic converter
none listed
Rated power
11.5 kW (≈15 hp)
Rated speed
7,500 rpm
Transmission
6-speed manual gearbox
Sales area
50S
Vehicle built by
Taizhou Qianxin Vehicle Co,.Ltd
Test vehicle model
FY250-4

Filing history and where it was sold

Benyate Motorsport filed one certificate under this family, for model year 2024, sold as 50-state, California included.

The vehicle itself is recorded as built by Taizhou Qianxin Vehicle Co,.Ltd in China, while the engine came from Chongqing Zongshen. Chassis parts and engine parts therefore have different origins.

Certified emission levels: CO 3.0, HC 0.6 g/km.

Other records carrying the same engine code

Benyate Motorsport certified an engine with this code under 8 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 11 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 RBYMC.223MCA

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.

BOXER · BULL · COUGAR · CRASHER · CRUSER · FIGHTER · GTS · GTX · HUNTER · MAX · NEXUS · RIDER · TITAN · VECTOR · VENZA · X-MAX

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.