Who makes Yongjiang Motors, Inc. engines?

Yongjiang Motors, Inc. engines were built by 2 different Chinese factories across 2006–2009: Chongqing Loncin, Chongqing Zongshen. Which one built yours depends on the model year.

Will parts from another brand fit my Yongjiang Motors, Inc.?

A shared factory and engine size makes another brand a strong candidate, but it does not prove the part numbers match. These machines are assembled from multiple component suppliers, so measure the part you have before ordering a replacement.

US importer / certificate holder

Who actually makes Yongjiang Motors, Inc.?

Yongjiang Motors, Inc. did not use one factory. Across 2006–2009 the engines came from 2 different Chinese manufacturers — so the answer depends on your model year.

Model years: 2006–2009
Engine factories: 2
Engine families: 7
Models certified: 62

What the Yongjiang Motors filings say about the engines

Every Yongjiang Motors filing on record is carburetted — 8 certificate rows, 2006 to 2009, and not one fuel-injected engine among them.

The engine codes on Yongjiang Motors' test vehicles —just one across the filings — are led by ZS167FMM. The code is stamped on the crankcase and is a better search term than the badge.

All 8 filings are 50-state certifications, so every one of these machines was certified for sale in California.

Rated power across the range runs from 5.6 kW to 12.8 kW (about 8 to 17 hp).

The vehicle builders named are Zhejiang Yongjiang Industrial Co., Ltd. and Zhejiang Yongjiang Industrial Co. Ltd. — the chassis and the engine do not always share a source.

Each figure is read straight off the EPA certificate rows; the per-family pages below carry the full breakdown for every engine family.

The factory changed. Here is when.

Engine manufacturer by model year, from the certification record
Model year	Engine factory on the certificate
2009	Chongqing Zongshen
2008	Chongqing Zongshen
2007	Chongqing Loncin · Chongqing Zongshen
2006	Chongqing Loncin

Engine families certified to Yongjiang Motors, Inc.

The engine family number is printed on the emission label on your machine. Match yours here to pin down the exact record.

Engine families with 15 or more certified models
Engine family	Years	Displacement	Models
6YGGX.125AYJ	2006	107, 124, 86cc	15
6YGGX.125DYJ	2006	107, 124, 86cc	15
7YGGX.125AM3	2007	107, 124, 86cc	15
7YGGX.125DM3	2007	107, 124, 86cc	15
7YGGX.250AM5	2007	197, 244cc	15
8YGGX.250AMA	2008	197, 229cc	15
9YGGX.125DMA	2009	107, 125, 86cc	15

Model names certified under Yongjiang Motors, Inc.

62 distinct model designations appear on this brand's certificates. Yours should be among them — importers sometimes market a machine under a different name than the one they certified.

O2S110 · O2S110-ATV · O2S125 · O2S125-ATV · O2S90 · O2S90-ATV · ODS110 · ODS110-ATV · ODS125 · ODS125-ATV · ODS90 · ODS90-ATV · OS2110 · OS2110-ATV · SSR110 · SSR110-ATV · SSR125 · SSR125-ATV · SSR90 · SSR90-ATV · YJ-110GY-A · YJ-110GY-B · YJ-110GY-C · YJ-125GY-A · YJ-125GY-B · YJ-200 · YJ-200A · YJ-200B · YJ-200C · YJ-200D · YJ-200E · YJ-200W · YJ-250A · YJ-250B · YJ-250C · YJ-250D · YJ-250E · YJ-250F · YJ-250G · YJ-250H · YJ-90GY-A · YJ-90GY-B · YJ-90GY-C · YJ-90GY-D · YJ-90GY-E · YJGS-F04A · YJGS-F04AK · YJGS-F04AM · YJGS-F04AM-2 · YJGS-F04AM-3 · YJI110 · YJI110-ATV · YJI125 · YJI125-ATV · YJI90 · YJI90-ATV · ZTX110 · ZTX110-ATV · ZTX125 · ZTX125-ATV · ZTX90 · ZTX90-ATV

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. Based on 8 China-engine certificate rows filed by Yongjiang Motors, Inc.. Full provenance and method.