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TPS Tools Throttle Position Sensor Adjustment Tool Reviews

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  • Retail Price ~$36.95 Shop Now
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DR.billZ

  • 5
  

Having a modern fuel injected dirt bike has some nice advantages, but a bit of a myth is that each are set-up out of the box to run their best and continually adjust themselves to this end. The truth is, you might be leaving some performance on the table if your Throttle Position Sensor (TPS) is not set to the "sweet spot", especially if you've made performance modifications. Fortunately, TPS adjustments aren't expensive or difficult and the folks at TPSTool.com have made it about as painless as it gets.
 
How It Works
 
Adjusting the TPS to its optimal position on any bike ensures that you're getting the most from your motor.  This sensor tells the Engine Control Unit (ECU) the precise position of the throttle so that the ECU can provide the correct fuel and timing for every throttle opening.  If the adjustment of this sensor is off, your motor won't run at its best.  For KTM EXC model motors, there's no easier or less expensive way to overcome the excessive bottom-end leanness of the stock fuel map.  
 
The TPS must be adjusted while it's powered up, just as it is when the bike is running.  The bike's ECU provides a perfect 5V reference power to the sensor however, the wires are watertight and there is no way to connect a mulit-meter to them to take a measurement while the power is on.  By plugging the TPSTool into the sensor, you're able to connect the multi-meter to the wires while the sensor is powered by the precise 5V reference provided by the bike's ECU. So, no external power supplies or batteries are required to make adjustments.
 
Installation

 

 

Performance
 
My stock TPS setting came in at .59 volts. TPSTool documentation advised that EXC models should be set at .64, so I shot for this value. But, .65 is where it seemed to settle in, so I ran with it. When I started the bike, I immediately noticed that the idle was lowered, but I left it alone. When riding, the bike felt like it was "jetted" fat (too rich). Also, after a ride I notice that the idle had climbed higher than it was before I had changed the adjusted TPS setting.
 
After consulting with the manufacturer, I was told that the 500XC-W would be better set a .62. I tried this setting and it felt perfect; idle was normal & stayed put and the throttle response was much more crisp. A key reason why I wanted to adjust the TPS was because on occasion, after the bike was up to operating temperature, during the first few minutes of riding after a short stop, the bike would flame out. Very frustrating! So, I'm happy to reply that the .62 TPS setting achieved with the TPSTool has corrected this problem. Yes!
 
Special Note: While adjusting the TPS is easy enough for a beginner mechanic, it's VERY TOUCHY. Only a small movement is needed. Even tightening the TPS down can change the setting, so watch carefully.
 
Pros :thumbsup:

  • Relatively inexpensive.
  • Easy to use & effective.
  • Manufactured by a ThumperTalk Member.
  • If you make changes in your mapping, you have this tool available in the future to recheck things.

Cons :thumbsdn:

  • Not self contained (you supply the multi-meter).

Bottom-line :prof:
If you want to squeeze every drop of performance out of your fuel injected bike, this product will allow you to dial in your optimal TPS setting in a cheap, easy to use package.

 

http://www.TPSTool.com

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Airboss/oc

  • 5
  

great product easy to use is it available for the 2017 500exc Ca ?

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HONDA65

  • 5
  

Not sure if this is the correct picture but regardless, it is an awesome little tool. Matt at TPS Tool helped me determine which coupler worked since he hadn't tried it on one yet. I had one for my short lived 2016 450 SX-F and after reading about, then experiencing for myself, the nasty decel popping the Kawi had, I ordered it up. Long story short, it worked better on the Kawi than the KTM. Why the magazines never tried it is beyond me. Thnak you Matt at TPS Tool

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oldfuddy

  • 5
  

I've not seen a US EXC come from the factory with the TPS set to factory .60 spec.   Most are between .57-.59.  Either way, even .60 is still lean on the US bikes and can cause excessive popping.

 

I used this tool for my '16 500 EXC 6-Days and sure enough it was set at .59 from the factory.  With the tool I was quickly able to adjust to .64 which was perfect and ran hard.  Following a new aftermarket full FMF exhaust and remapping with the EU map, the .64 made the bike feel fat and sluggish. A couple minutes with the TPS Tool and I was able to find the perfect setting which was .60 for my bike.  easy peasie....

 

This tool is a must have for anyone with the new Fi bikes.  It's just so simple to use.

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sirthumpalot

  • 5
  

Quick and easy, gets the job done every time!

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