Opmid Dash & Gauge Buyer Guide – Honda Monkey, CT125 Trail, Honda Grom

Overview

Upgrading your motorcycle’s gauges and instruments brings you better visibility, more engine data, and smarter alerts than stock instrument clusters. Aftermarket gauges let you monitor vital information like speed, RPM, temperature, voltage, and trip info — giving you real-time insight into your Honda Monkey's performance and health.

This guide will help you decide:

• What instrument upgrades do
• The types of gauges available
• Why monitoring engine data matters
  
  

Why do I need a Temp. Gauge or New Dash ?

Stock gauges often display just the basics. Aftermarket options go further, providing:

• Digital speedometer / tachometer
• Engine temperature monitoring
• Voltmeter to track battery/charging system
• Shift indicator / max RPM alerts
• Trip meter & odometer with customizable reset
• Oil change reminder and runtime tracking
• Programmable warning lights for over-temp / over-rev conditions
• MADE in Japan

These instruments help you keep an eye on electronics and engine behavior — especially useful after mods or for performance-minded riders.

Types of Instrument Upgrades

Digital Dash / Multi-Meter Displays

OPMID M1204 Multi Meter DASH (2019-2021 Monkey)  $297

OPMID M1204 Multi Meter DASH (2022+ Monkey)  $339.95

• Plug-and-play multi-function dashboards with speed, RPM, oil temp, voltmeter, trip meters, programmable alerts, and oil change
• Speedometer up to 123mp/h or 199km/h
• Trip Meter A/B
• Clock: 12hr display
• Oil Thermometer
• Voltmeter
• Tachometer
• Shift Indicator
• Fuel Gauge
• MADE in Japan

Temperature / Voltmeter Gauges

For riders focused on engine health and electrical system monitoring, simple dedicated gauges can make a big difference:

• Engine / head temperature gauges — monitor actual engine temp so you know if your tune, oil cooler, or airflow setup is working safely.
• Voltmeter functionality — keeps track of battery voltage and alternator health.
  
  

Benefits of Upgrading Gauges (Temp. & Dash)

• Knowing real-time engine temperatures or RPMs helps you avoid overheating or over-revving under load.
• Voltmeter readouts let you confirm the charging system is healthy and diagnose electrical issues early.
• Trip meters, hour meters, and max speed recall help you plan maintenance and track performance over time.
• Aftermarket instruments can allow you calibrate for tire size changes, sprocket ratios, and engine mods (if applicable) — keeping your readouts accurate even after performance upgrades.

This additional data provided by the aftermarket gauges can allow the rider more insight into what is going on inside the motor.

Installation Notes & Tips

• OPMID Temperature Gauge Designed specifically for Honda Grom, Honda Monkey & CT125
• OPMID Multi-Meter Digital Dash Designed specifically for Honda Monkey & CT125
• Always follow manufacturer wiring diagrams when installing plug-n-play harnesses.
• Most digital gauges allow unit selection (mph/kmh) and settings for sensor thresholds.
• Check year compatibility before purchasing

Always verify fitment with your specific model year and engine configuration.

Upgrading your instrument panel with aftermarket gauges — from multifunction digital dashboards to dedicated temp and volt meters — gives you richer insight and better control over your motorcycle’s performance and health. These instruments help you stay informed, react faster to mechanical issues, and make the most of performance upgrades. 

Ready to Upgrade?

If you want to keep watch on Engine Temps for your Honda Grom, Honda Monkey and Honda CT125 the OPMID Engine Temp. Gauge is the perfect fit.

If you want to have a much better dash watch on Engine Temps, Shift Indicator, Clock, Speedometer, etc. for your Honda Monkey and Honda CT125 the OPMID Multi-Meter Dash is the perfect fit.

Shop OPMID Digital Dash & Engine Temperature Gauge