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The Scooter Parts Registry

EPA engine family

Engine family NHSNX.229USV

If this code is printed on your emission label, this is your machine's federal record: sold under Hisun Motors Corp., U.S.A., with an engine built by Chongqing Huansong, certified as ATVs.

Displacement
—
Model years
2022
Models certified
18
Certificates
1

What this record says

Sold in the US by
Hisun Motors Corp., U.S.A.
Engine built by
Chongqing Huansong
Vehicle category
ATVB-Meeting EPA ATV Definition
Certificate numbers
NHSNX.229USV-011

What the number itself says

Reading NHSNX.229USV left to right: N is the model-year letter for 2022, HSN is the three-character code the EPA assigned to Hisun Motors Corp., U.S.A. as certificate holder, X marks an off-road certification, .229 is the displacement in litres, so 229cc and USV is Hisun Motors Corp., U.S.A.'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 Hisun Motors Corp., U.S.A. submitted for this family (model HS250UTV-4) carried engine code HS1P65MM. In the Chinese engine-model convention that reads as one cylinder, horizontal (flat) cylinder, with a nominal 65 mm bore, MM series.

The certificate describes a four-stroke, single-cylinder engine with 2 valves per cylinder fed by sequential multi-port fuel injection, with an oxygen sensor for closed-loop fuelling, run by an engine control module (ECM). There is a catalytic converter in the exhaust, recorded as "Three Way Catalyst (TWC), single-bed, closed-loop warm up".

Rated power on the record is 12.4 kW (about 17 hp) at 7,500 rpm, driving through a CVT (belt and variator).

Engine code on test vehicle
HS1P65MM
Nominal bore (from the code)
65 mm
Cylinders / valves
1 · 2 per cylinder
Cycle
four-stroke
Fuel delivery
sequential multi-port fuel injection
Oxygen sensor
yes (closed loop)
Engine control
ECM
Catalytic converter
Three Way Catalyst (TWC), single-bed, closed-loop warm up
Rated power
12.4 kW (≈17 hp)
Rated speed
7,500 rpm
Transmission
CVT (belt and variator)
Sales area
50S+49S
Vehicle built by
Chongqing Huansong Science and Technology Industrial Co., Ltd.; Vietnam New Century Industrial Company Limited
Test vehicle model
HS250UTV-4

Filing history and where it was sold

Hisun Motors Corp., U.S.A. filed one certificate under this family, for model year 2022, sold as both a 50-state and a 49-state version.

The vehicle itself is recorded as built by Chongqing Huansong Science and Technology Industrial Co., Ltd. and Vietnam New Century Industrial Company Limited in China and Vietnam, while the engine came from Chongqing Huansong. Chassis parts and engine parts therefore have different origins.

Certified emission levels: CO 3.9, HC+NOx 0.9 g/km.

Other records carrying the same engine code

Hisun Motors Corp., U.S.A. certified an engine with this code under 21 other family numbers — the same engine filed again in another year, or in an off-road and a street version:

  • FHSNX.229A15 (2015)
  • GHSNX.229A15 (2016)
  • HHSNX.229ATV (2017)
  • HHSNX.229A15 (2017)
  • JHSNX.229ATV (2018)
  • JHSNX.229A15 (2018)
  • KHSNX.229UTV (2019)
  • KHSNX.229ATT (2019)
  • LHSNX.229ATT (2020)
  • LHSNX.229UTV (2020)
  • MHSNX.229ATT (2021)
  • MHSNX.229UTV (2021)
  • NHSNX.229ATT (2022)
  • PHSNX.229AT2 (2023)
  • PHSNX.229USV (2023)
  • RHSNX.229AT2 (2024)
  • RHSNX.229USV (2024)
  • SHSNX.229AT2 (2025)
  • SHSNX.229USV (2025)
  • THSNX.229AT2 (2026)
  • THSNX.229USV (2026)

Other certificate holders whose test vehicle carried the same engine code:

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 NHSNX.229USV

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.

Axis 250 · Axis 250R · HS200UTV · HS200UTV-2 · HS250UTV · HS250UTV-2 · HS250UTV-3 · HS250UTV-4 · OUTFITTER 250 · OUTFITTER 250R · RK Performance 250 · RK Performance 250R · SECTOR 250 · SECTOR 250R · STRIKE 250 · STRIKE 250R · VECTOR 250 · VECTOR 250R

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.