Who makes O2Sports, Inc. engines?

O2Sports, Inc. engines were built by 2 different Chinese factories across 2006–2007: Chongqing Loncin, Zhejiang Sunjazz Gymnastic Equipment Co., Ltd.. Which one built yours depends on the model year.

Will parts from another brand fit my O2Sports, 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 O2Sports, Inc.?

O2Sports, Inc. did not use one factory. Across 2006–2007 the engines came from 2 different Chinese manufacturers — so the answer depends on your model year.

Model years: 2006–2007
Engine factories: 2
Engine families: 6
Models certified: 30

The factory changed. Here is when.

Engine manufacturer by model year, from the certification record
Model year	Engine factory on the certificate
2007	Chongqing Loncin
2006	Zhejiang Sunjazz Gymnastic Equipment Co., Ltd.

Model names certified under O2Sports, Inc.

30 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.

SJDK-110A · SJDK-110B · SJDK-110C · SJDK-110D · SJDK-110E · SJDK-125A · SJDK-125B · SJDK-125C · SJDK-125D · SJDK-125E · SJDK-150A · SJDK-150B · SJDK-150C · SJDK-150D · SJDK-150E · SJDK-200A · SJDK-200B · SJDK-200C · SJDK-200D · SJDK-200E · SJTV-200A · SJTV-200B · SJTV-200C · SJTV-200D · SJTV-200E · SJTV-250A · SJTV-250B · SJTV-250C · SJTV-250D · SJTV-250E

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 6 China-engine certificate rows filed by O2Sports, Inc.. Full provenance and method.