Chinese engine factory
Shanghai Tong Jian Sports Equipment Co., Ltd.: every American brand built here
Federal certification records name Shanghai Tong Jian Sports Equipment Co., Ltd. as the engine manufacturer behind 2 American powersports brands. Here is the full list, model year by model year.
- US brands
- 2
- Model years
- 2008–2010
- Engine families
- 4
- Displacement
- 149cc
American brands supplied by Shanghai Tong Jian Sports Equipment Co., Ltd.
| US brand (certificate holder) | Model years | Engine families | Models certified |
|---|---|---|---|
| Baja Inc. | 2009–2016 | 44 | 83 |
| Hammerhead Off-Road, Inc. | 2007–2010 | 10 | 35 |
Which of those machines are actually comparable
A shared factory alone is a weak signal — Shanghai Tong Jian Sports Equipment Co., Ltd. builds engines across 149cc. Grouping by engine size narrows it to machines genuinely worth comparing.
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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. This page describes 4 certificate records naming Shanghai Tong Jian Sports Equipment Co., Ltd.. Full provenance and method.