Recommended Additional Upgrades
01
Uma Racing Engine Oil
Get smoother engine performance with Uma Racing Full Synthetic Engine Oil.
02
Uma Laser Iridium Spark Plug
Improve ignition with Uma Racing Laser Iridium Spark Plug.
The UMA Racing Throttle Position Sensor (TPS) for the Yamaha R15 V2 is a high-precision electronic component designed to replace the stock 3-in-1 sensor. While the factory sensor is built for standard reliability, the UMA version is engineered for higher resolution and faster data transmission, which is essential for modified engines or those running aftermarket ECUs.
It is a critical upgrade if you find your throttle feels “lazy” or if you are experiencing erratic idling after installing a larger throttle body.
Key Features
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Higher Resolution: Provides more data points to the ECU for every degree of throttle turn. This allows for much more precise fuel and ignition timing adjustments, especially at partial throttle.
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3-in-1 Functionality: Like the OEM unit, this sensor typically handles three critical readings in one housing:
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Throttle Position (TPS): Angle of the butterfly valve.
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Manifold Absolute Pressure (MAP): Intake vacuum/pressure.
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Intake Air Temperature (IAT): Temperature of incoming air.
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Quicker Response: Reduces the “lag” between your hand movement and the ECU’s calculation, resulting in a snappier, more connected engine feel.
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Accuracy for Tuning: Highly recommended when using the UMA M5/M9 ECU or Aracer systems, as it provides the stability needed to “zero” the throttle position accurately during the calibration process.
Technical Specifications
| Feature | UMA Racing TPS Details |
| Model Compatibility | R15 V2 |
| Sensor Type | 3-in-1 (TPS, MAP, IAT) |
| Installation | Plug-and-Play (Direct OEM Replacement) |
| Housing | High-durability plastic with weather-sealed connector |
When should you upgrade?
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Aftermarket ECU: If you are using a racing ECU, the stock TPS can sometimes have “noise” or signal fluctuations. The UMA sensor provides a cleaner signal for smoother mapping.
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Modified Throttle Body: If you have upgraded to a 32mm or 34mm UMA Throttle Body, the stock sensor may not always calibrate perfectly to the new butterfly range. This sensor is designed to match UMA’s performance hardware.
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Erratic “Hunting” Idle: If your R15 V2 has a “hunting” idle (RPMs bouncing up and down at a stop), it is often a sign of a failing or inaccurate TPS. The UMA unit is a common fix for this issue.
Installation Pro-Tip
After installing the UMA TPS, you must reset the TPS parameters on your ECU. If you are using the stock ECU, this usually involves a specific key-on/throttle-pull sequence or a diagnostic tool. If you are using an aftermarket ECU (like the M5), you simply use the software to “Reset TPS” so the computer knows exactly where 0% and 100% throttle are located.
| Product Specifications | What’s in the Box? |
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FAQs
What does a TPS sensor do?
It tells the ECU throttle opening position so fuel and ignition can be adjusted correctly.
Will this fix throttle lag?
If your old TPS is faulty or inaccurate, yes it can significantly improve response.
Do I need tuning after installation?
Usually no for stock setups, but tuned bikes may benefit from recalibration.
