EPA engine family
Engine family 9TMTX.500A05
If this code is printed on your emission label, this is your machine's federal record: sold under Tomoto Industries, Inc., with an engine built by Chongqing Huansong, certified as ATVs.
- Displacement
- —
- Model years
- 2009
- Models certified
- 39
- Certificates
- 1
What this record says
- Sold in the US by
- Tomoto Industries, Inc.
- Engine built by
- Chongqing Huansong
- Vehicle category
- ATVA-Meet EPA & ARB ATV Definition
- Certificate numbers
- 9TMTX.500A05-004-R01
What the number itself says
Reading 9TMTX.500A05 left to right: 9 is the model-year letter for 2009, TMT is the three-character code the EPA assigned to Tomoto Industries as certificate holder, X marks an off-road certification, .500 is the displacement in litres, so 500cc and A05 is Tomoto Industries' 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 certificate describes a four-stroke, single-cylinder engine with 2 valves per cylinder fed by carburettor. No catalytic converter is listed.
Rated power on the record is 25 kW (about 34 hp) at 5,000 rpm, driving through a CVT (belt and variator).
- Cylinders / valves
- 1 · 2 per cylinder
- Cycle
- four-stroke
- Fuel delivery
- carburettor
- Oxygen sensor
- no
- Catalytic converter
- none listed
- Rated power
- 25 kW (≈34 hp)
- Rated speed
- 5,000 rpm
- Transmission
- CVT (belt and variator)
- Sales area
- 50S
- Vehicle built by
- Chongqing Huansong Industrial Group Co., Ltd.
- Test vehicle model
- Supermach 500U
Filing history and where it was sold
Tomoto Industries filed one certificate under this family, for model year 2009, sold as 50-state, California included.
The vehicle itself is recorded as built by the same company, Chongqing Huansong Industrial Group Co., Ltd. in China — engine and chassis from one source.
Certified emission levels: CO 5, HC+NOx 1.4 g/km.
Models certified under 9TMTX.500A05
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.
BM500ATV-S · BM500ATV-U · BM500UTV · BMS 450S · BMS 450U · BMS 500S · BMS 500U · Discovery XLT 500 · Front Runner 500 · HS 450S · HS 450U · HS500S · HS500U · Mountaineer 500ATV · Mountaineer 500UTV · NST 450S · NST 450U · NST 500S · NST 500U · Retriever 500 · Rodeo 500 · SDX-500 · SLA-500A · SLA-500S · Supermach 450S · Supermach 450U · Supermach 500S · Supermach 500U · Tomoto 450S · Tomoto 450U · Tomoto 500S · Tomoto 500U · US Titan 450S · US Titan 450U · US Titan 500S · US Titan 500U · WD 450S · WD 500S · WD 500U
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.