Koso HD-01R GP Style Tachometer User Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of your Koso HD-01R GP Style Tachometer. This universal tachometer is designed for both 2-stroke and 4-stroke motorcycles, offering precise RPM readings up to 16,000 RPM and water temperature display up to 150 °C. Please read this manual thoroughly before installation and use to ensure proper function and safety.

Koso accessories are known for their reliability, achieved through high-quality manufacturing and the use of premium components. This device is suitable for both original equipment tuning and custom modifications.

2. Safety Information

Always observe the following safety precautions to prevent injury or damage to the product and your vehicle:

• Professional Installation Recommended: If you are not familiar with motorcycle electrical systems, seek professional assistance for installation.
• Disconnect Battery: Always disconnect the vehicle's battery before performing any electrical work.
• Correct Wiring: Ensure all wiring connections are correct and secure to prevent short circuits or malfunction. Refer to the wiring diagram provided.
• Mounting: Mount the tachometer securely to prevent it from becoming loose during operation, which could cause distraction or damage.
• Water Resistance: While designed for outdoor use, avoid direct high-pressure water spray on the unit.
• Operating Temperature: Do not operate the device outside its specified temperature range.

3. Package Contents

Verify that all items are present in the package:

• Koso HD-01R GP Style Tachometer (Chromed housing with white meter base)
• Universal wiring harness
• Connection clips
• Handlebar mounting kit (aluminum holder)
• Speed sensor (if included in specific kit)
• Koso sticker
• Instruction manual & mounting diagram

Image 1: Koso HD-01R GP Style Tachometer. This image shows the tachometer unit with its chromed casing and white background dial, ready for installation.

4. Setup and Installation

Follow these steps for proper installation of your Koso HD-01R tachometer:

1. Mounting the Tachometer:
   • Select a suitable location on your handlebar for optimal visibility without obstructing your view of the road.
   • Use the provided aluminum holder and mounting kit to securely attach the tachometer. Ensure it is firmly fixed to prevent vibration damage.
2. Wiring Connections:

   Refer to the included mounting diagram for specific wiring details. General connections include:

   • Power (Red Wire): Connect to a switched 12V DC power source (e.g., ignition switch).
   • Ground (Black Wire): Connect to a reliable chassis ground point.
   • RPM Signal (Yellow Wire): Connect to the ignition coil's primary side or a dedicated RPM signal wire from the ECU. Adjust settings for 2-stroke or 4-stroke engine type as per the operating instructions.
   • Water Temperature Sensor (Blue/Green Wires): Connect the temperature sensor wires to the designated inputs on the tachometer. Install the temperature sensor in a suitable location in the cooling system.
3. Initial Power-Up:

   After all connections are made, reconnect the battery. Turn on the ignition and verify that the tachometer powers on and displays readings. If not, recheck all connections.

5. Operating Instructions

The Koso HD-01R GP Style Tachometer offers several functions:

• Tachometer Display: Displays engine RPM up to 16,000 RPM. The needle indicates current RPM.
• Water Temperature Display: Shows water temperature up to 150 °C.
• Maximum RPM Memory: The unit records and can display the highest RPM reached during operation. Consult the detailed manual for instructions on how to access and reset this memory.

5.1. Setting Engine Type (2-stroke/4-stroke)

The tachometer must be configured for your specific engine type to ensure accurate RPM readings. Refer to the detailed instruction manual for the exact button sequence to enter the settings menu and select between 2-stroke and 4-stroke engine modes.

5.2. Accessing Maximum RPM Memory

To view the stored maximum RPM, typically a button press or sequence is required. This feature allows you to monitor peak engine performance. Follow the instructions in the comprehensive manual for this operation.

6. Maintenance

The Koso HD-01R tachometer requires minimal maintenance:

• Cleaning: Use a soft, damp cloth to clean the display and housing. Avoid abrasive cleaners or solvents that could damage the finish.
• Connection Checks: Periodically inspect all wiring connections for tightness and corrosion, especially after riding in wet conditions.
• Mounting Security: Ensure the mounting bracket remains secure and free from excessive vibration.

7. Troubleshooting

If problems persist after attempting these solutions, contact Koso customer support or a qualified technician.

8. Specifications

• Model: HD-01R GP Style Tachometer
• Brand: KOSO
• Part Number: 4491388
• Functions: Tachometer, Water Temperature, Max RPM Memory
• RPM Range: 0 - 16,000 RPM
• Water Temperature Range: 0 - 150 °C
• Engine Compatibility: 2-stroke and 4-stroke motorcycles
• Housing: Chromed
• Mounting Material: Aluminum
• Dimensions: Diameter: 55 mm, Depth: 57 mm
• Power Supply: 12V DC (vehicle battery)

9. Warranty and Support

Koso products are manufactured to high standards. For warranty information, please refer to the warranty card included with your product or visit the official Koso website. Keep your purchase receipt as proof of purchase.

For technical support, installation assistance, or troubleshooting beyond this manual, please contact Koso customer service through their official channels. Contact details can typically be found on the Koso website or in the product packaging.

Return Policy: The product has a 30-day return/replacement policy through Amazon, as per the purchase details. For specific warranty claims directly with Koso, consult their official policy.