Engine family SLPUX.493LHS

What this record says

Sold in the US by

Linhai Powersports USA Corporation

Engine built by

Jiangsu Linhai Power

Vehicle category

Utility Vehicle - EPA Only

Certificate numbers

SLPUX.493LHS-008

What the number itself says

Reading SLPUX.493LHS left to right: S is the model-year letter for 2025, LPU is the three-character code the EPA assigned to Linhai Powersports USA as certificate holder, X marks an off-road certification, .493 is the displacement in litres, so 493cc and LHS is Linhai Powersports 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 Linhai Powersports USA submitted for this family (model LH500U-B) carried engine code LH188MR-2A. In the Chinese engine-model convention that reads as one cylinder with a nominal 88 mm bore, MR series. Against the certified 493cc that implies a stroke of roughly 81 mm — a sanity check for a piston or cylinder listing, not a published figure.

The certificate describes a four-stroke, single-cylinder engine with 4 valves per cylinder fed by throttle-body 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 24 kW (about 32 hp) at 6,500 rpm, driving through a CVT (belt and variator).

Engine code on test vehicle

LH188MR-2A

Nominal bore (from the code)

88 mm · implied stroke ≈ 81 mm

Cylinders / valves

1 · 4 per cylinder

Cycle

four-stroke

Fuel delivery

throttle-body fuel injection

Oxygen sensor

yes (closed loop)

Engine control

ECM

Catalytic converter

Three Way Catalyst (TWC), single-bed, closed-loop warm up

Rated power

24 kW (≈32 hp)

Rated speed

6,500 rpm

Transmission

CVT (belt and variator)

Sales area

49S

Vehicle built by

Jiangsu Linhai Power Machinery Group Co., Ltd.

Test vehicle model

LH500U-B

Filing history and where it was sold

Linhai Powersports 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, Jiangsu Linhai Power Machinery Group Co., Ltd. in China — engine and chassis from one source.

Certified emission levels: CO 9.6, HC+NOx 0.5 g/km.

Other records carrying the same engine code

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

• TLPUX.493LHS (2026)

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

• Massimo Motor Sports, LLCTMMMX.493LHF2026 · same engine factory
• Massimo Motor Sports, LLCSMMMX.493LHF2025 · same 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 SLPUX.493LHS

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.

ATV500 ProMax · ATV500-D · BUCK 550 · BUCK 550X · BUCK 560 · BUCK 560X · LH500U-B · M550L · M560L · M570L · MSA 550 · MSA 560 · MSA 570 · T-BOSS 550 · T-BOSS 550F · T-BOSS 550X · T-BOSS 560 · T-BOSS 560X

Other American badges on engines from the same factory

• Jiangsu Linhai Power · 300cc3 American brands · 2009–2026
• Jiangsu Linhai Power · 250cc3 American brands · 2007–2026
• Jiangsu Linhai Power · 150cc5 American brands · 2006–2023
• Jiangsu Linhai Power · 500cc and above4 American brands · 2010–2027
• Jiangsu Linhai Power · 180cc3 American brands · 2007–2026
• Jiangsu Linhai Power · 450cc2 American brands · 2019–2026