Recommended Additional Upgrades
01
Uma Laser Iridium Spark Plug
Improve ignition with Uma Racing Laser Iridium Spark Plug.
03
Uma Racing Engine Oil
Get smoother engine performance with Uma Racing Full Synthetic Engine Oil.
The UMA Racing M5 ECU is a top-tier, standalone programmable racing engine control unit designed specifically for the Yamaha R15 V3 Indonesian version (Indo spec). Unlike basic piggyback controllers, the M5 completely replaces the stock factory ECU, removing all built-in performance limitations and giving you total control over the engine’s management system.
The Indonesian spec R15 V3 (distinguished by its stock inverted/USD front forks and lack of a stock dual-channel ABS system found in some other regions) is an ideal candidate for this ECU, allowing riders to capitalize on its high-revving VVA power plant.
Key Features
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Wireless Smartphone Tuning (B-Link): Includes the B-Link Bluetooth module, allowing you to connect directly to the ECU via the UMA Racing app on an iOS or Android smartphone. You can adjust maps, calibrate the throttle, and view live engine telemetry on the fly.
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Complete Limiter Removal: Completely unlocks the factory RPM ceiling. This allows you to safely stretch your gears further and maximize the top speed potential on track days or long highway stretches.
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Fuel & Ignition Parameter Mapping: Offers precise real-time adjustments for fuel injection volume and ignition timing. This allows you to build a perfect air-fuel ratio (AFR) across the entire rev range.
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Variable Valve Actuation (VVA) Optimization: Allows you to adjust exactly when the VVA high-lift cam switches over (factory is set at 7,400 RPM). You can lower or smooth out the transition point to suit your specific intake or exhaust upgrades.
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Real-Time Data Monitoring: Transform your smartphone into a secondary digital dashboard to track critical live data, including engine RPM, engine temperature, battery voltage, TPS (Throttle Position Sensor) percentage, and precise error diagnostics.
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Weatherproof Design: Engineered with an IP-rated casing that is fully dust-proof and water-resistant, protecting the internal processors from harsh road conditions and rain.
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Plug-and-Play Setup: Built with OEM-spec pin connectors configured specifically for the Indonesian R15 V3 wiring harness, making the initial physical installation clean and non-destructive.
Technical Specifications
| Feature | UMA Racing M5 Details |
| Compatible Bike | Yamaha R15 V3 (Indonesian Spec / USD Fork Model) |
| ECU Type | Standalone Performance ECU |
| Connectivity | Bluetooth via B-Link Module |
| Tuning Interface | Smartphone App (iOS & Android) or PC |
| Key Controls | Fueling, Ignition Timing, VVA Engagement Point, RPM Limit |
| Enclosure | Dust-proof & Water-resistant |
Why Choose the UMA Racing M5 for the R15 V3 Indo?
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Essential for Advanced Upgrades: If you install a high-flow air filter, a full-system racing exhaust, a larger throttle body, or a big-bore kit, the stock ECU cannot adapt to the drastic shift in airflow. The M5 allows you to richen the fueling precisely to prevent the engine from running lean and running hot.
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Instant Acceleration Gains: By advancing the ignition timing at lower RPM zones, you eliminate the slight lag present in the factory emissions-compliant tune, giving the 155cc motor a vastly sharper throttle response.
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No Laptop Required: While professional tuners can still use a PC, the ability to tweak cold-start fuel compensation or idle speed right from your phone makes it exceptionally accessible for enthusiast riders.
Tuner’s Safety Note
Because a standalone ECU allows you to change internal timing and fueling completely, improper tuning can cause severe engine damage. It is highly recommended to start with the base map provided by UMA Racing or have the bike properly dialled in on a motorcycle chassis dynamometer (Dyno) using a wideband lambda sensor to ensure safe air-fuel ratios.
