Koso’s philosophy


Koso, a synonym for quality and performance. With more than 35 years of experience designing and manufacturing high quality products, Koso has become well known across the powersports and OEM industries for its good reputation for reliability, innovation and capability. Whether we are manufacturing a product under private label, OEM or aftermarket products quality always remains our top priority. Innovation and creating new technologies are the keys to Koso’s philosophy and drives us to continue pushing the limit further.
For several years now, Koso has had the opportunity to work with and outstanding team of engineers. Along with our state of the art testing equipment and production facilities, Koso has remained a leader in analog and digital technology. Koso produces a wide range of quality gauges/meters, heated equipment, LED indicators taillights and headlights as well as mirrors and engine parts. Koso is proud to offer a complete line of quality products for serious riders.

Company history

1981

Creation of Tong Yah Industrial co., LTD Koso was only producing motorcycle performance parts.
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1989

Company name changed to Tong Yah Electronic Technology Started to build meters and use of electronic production line.
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2000

ISO 9002 quality system certified.
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2005

Creation of Koso North America branch office.
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2006

TS-16949 quality system certified
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2008

Creation of Koso Europe branch office

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2014

Registred D&B D-U-N-S

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2017

Separation of electronic factory and Mechanical factory

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2018

Upgrade TS 16949 certification to IATF 16949 certification

Issued Top 1000 Elite SME