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KOSO Manuals & User Guides

KOSO manufactures high-performance aftermarket electronic gauges, LED lighting, and engine components for motorcycles, scooters, and powersports vehicles.

Tip: include the full model number printed on your KOSO label for the best match.

About KOSO manuals on Manuals.plus

KOSO is a premier manufacturer in the powersports aftermarket industry, best known for its high-quality digital instrumentation and electronic accessories. The brand specializes in developing precise monitoring systems, including multifunction speedometers, tachometers, EGT (Exhaust Gas Temperature) gauges, and air/fuel ratio meters, designed to enhance the riding experience for motorcycle, scooter, and ATV enthusiasts.

KOSO's product lineup also includes performance engine parts such as high-flow oil pumps, camshafts, and transmission components. With a slogan of "Feel The Speed," KOSO designs plug-and-play solutions for popular vehicle makes like Harley-Davidson, Honda, and Yamaha, offering riders both aesthetic upgrades and critical performance data. Their instruments are engineered for durability and accuracy, often featuring customizable displays and warning parameters to suit competitive racing or daily commuting needs.

KOSO manuals

Manuals més recents de manuals+ seleccionat per a aquesta marca.

Instruccions de la bomba d'oli d'alt cabal KOSO NF623000

20 de juny de 2024
KOSO NF623000 High Flow Oil Pump Product Usage Instructions Installation: Before starting the installation process, carefully read the instructions provided in the manual. Follow the steps described to ensure proper…

Instruccions d'indicador KOSO v2024 dual EGT

6 de juny de 2024
KOSO v2024 Dual EGT Gauge Thank you for purchasing our product. Before installing/operating the product, read the instructions carefully and retain them for future reference. Attention! For installation, follow the…

Instruccions del mesurador TFT multifunció KOSO RX-4

14 d'abril de 2023
KOSO RX-4 Multifunction TFT Meter Instructions Thank you for purchasing our product. Before installing/operating the product, read the instructions carefully and retain them for future reference. Attention!  For installation, follow…

Instruccions del comptador multifunció KOSO D2

12 d'agost de 2022
D2 Multifunction Meter Instructions Thank you for purchasing our product. This product is a multifunction meter and is easy to install. Before using, read the instructions carefully and retain them…

KOSO Heated Grips Installation and Operation Manual

manual d'instruccions
Comprehensive instruction manual for KOSO heated grips, covering installation, specifications, function settings, low-voltage mode, and troubleshooting. Ensure safe and proper use of your KOSO heated grips.

KOSO HD-03L Gauge Kit Installation and Operation Manual

Manual d'instruccions
This manual provides detailed instructions for installing, operating, and configuring the KOSO HD-03L 4-piece gauge kit for Harley Davidson motorcycles. It covers accessories, disassembly, wiring, gauge overview, settings, and troubleshooting.

KOSO manuals from online retailers

Koso DL-03SR GP-Style Speedometer User Manual

BB642W20 • November 14, 2025
Comprehensive instruction manual for the Koso DL-03SR GP-Style Speedometer (Model BB642W20), covering installation, operation, maintenance, and specifications.

Koso XR-SA Speedometer Instruction Manual

XR-SA • October 16, 2025
Comprehensive instruction manual for the Koso XR-SA Speedometer, covering installation, operation, maintenance, and specifications. Learn how to set up and use your digital speedometer, odometer, and trip meter…

KOSO TNT-04 Multifunction Gauge User Manual

TNT-04 • September 25, 2025
Comprehensive user manual for the KOSO TNT-04 Multifunction Gauge, detailing installation, operation, technical specifications, and troubleshooting for its tachometer, speedometer, odometer, thermometer, fuel level, clock, and volt meter…

Koso BA041000 Multi-Functions Meter User Manual

BA041000 • 13 de setembre de 2025
Comprehensive user manual for the Koso BA041000 Multi-Functions Meter, providing detailed instructions for setup, operation, maintenance, and troubleshooting. This meter is designed for sports bikes, street fighters, and…

KOSO RX2N Digital Motorcycle Gauge User Manual

MQ905-W • October 16, 2025
Comprehensive user manual for the KOSO RX2N LCD Digital Motorcycle Odometer Speedometer and Fuel Meter (Model MQ905-W), including setup, operation, specifications, and troubleshooting.

KOSO support FAQ

Preguntes freqüents sobre manuals, registre i assistència per a aquesta marca.

  • Can I disassemble my KOSO gauge for maintenance?

    No. Opening or disassembling the unit yourself will void the warranty. Maintenance and repairs should only be executed by KOSO professionals.

  • What should I check if my KOSO gauge does not power on?

    First, ensure the wiring includes a solid ground and that the 12V power supply is connected. Check if the battery voltage is sufficient (at least DC 12V) and inspect the fuse and wiring harness for breaks.

  • How do I connect the Zenith LED Headlight wires?

    For the KOSO Zenith LED headlight, connect the Yellow wire to the Low beam, the Blue wire to the High beam, the White wire to the Front Position Light, and the Black wire to the vehicle body or engine ground.

  • What does 'LO RNG' mean on my KOSO digital gauge?

    'LO RNG' indicates that the remaining fuel range is low (typically under 16 km or 10 miles). This is a warning to refuel soon.

  • How do I enter the settings mode on my KOSO meter?

    Generally, you must have the key switched to ON, the engine stop switch OFF, and the meter displaying the Odometer. Then, hold both turn signal switches (or the specified button combination for your model) for 3 seconds to enter settings.