TPS - to disconnect or not to disconnnect, that is the question


14 replies to this topic
  • marcoma

Posted January 25, 2007 - 09:12 PM

#1

Okay - lets have the proverbial show of hands. Who has their TPS disconnected and what differences have you experienced?
I tried mine once and it sounded like it was pinging on lower rpm. I figure its there for a reason but I've read posts of guys disconnecting theirs with good effect.

So whats the consensus? :ride:

  • TARFELE

Posted January 26, 2007 - 04:58 AM

#2

I did mine a few times on a couple of desert rides where I would be at steady RPMs for an extended period of time. It took the chug out. When I am racing I keep it plugged in because I cannot feel the chug then. The steady RPM is the only thing that is effected IMO. I am a novice rider an I cannot tell a difference in performance when it is plugged or unplugged.

  • jim-in-so-ore

Posted January 26, 2007 - 06:33 AM

#3

I have been running with mine unplugger for a couple of years now. Mine is dual sported and when riding on the road it surged. With it unplugged, the is gone.Much smoother ride.:ride:
Jim

  • jim-in-so-ore

Posted January 26, 2007 - 06:34 AM

#4

I have been running with mine unplugged for a couple of years now. Mine is dual sported and when riding on the road it surged. With it unplugged, the surge is gone.Much smoother ride.:ride:
Jim

  • clark4131

Posted January 26, 2007 - 08:46 AM

#5

Prior to unplugging it for good, it's wise to determine if it needs to be adjusted or not. There's a process in the manual wherein you use a multimeter to determine if it is operating in the correct voltage range. It's very straightforward and simple. A notable amount have come from the factory adjusted incorrectly and after it's corrected, a lot of problems associated with it are solved. I'd give that a whirl first and if you still don't like it, then unplug it...SC

  • Jwar1r1t3

Posted January 26, 2007 - 01:51 PM

#6

What is the benefit of having a throttle position sensor anyway? What made the manufacturer decide the bikes need this?

  • Fullbore4

Posted January 26, 2007 - 02:53 PM

#7

My dealer tech says to keep it plugged in. I am convinced it doesn't hurt performance as long as its adjusted right...my 2 cents.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • GCannon

Posted January 29, 2007 - 09:11 AM

#8

What is the benefit of having a throttle position sensor anyway? What made the manufacturer decide the bikes need this?


It is input information used by your ignition computer to control ignition timing!

  • clark4131

Posted January 29, 2007 - 05:25 PM

#9

My dealer tech says to keep it plugged in...


That makes it suspect right there...SC

  • Fullbore4

Posted January 29, 2007 - 06:58 PM

#10

That makes it suspect right there...SC


yah i would agree if I didn't know the tech......he's on our side not the so-called yamaha techs that are available to the general public who get confused about the term spoke wrench.

  • byggd

Posted January 30, 2007 - 09:34 AM

#11

What is the benefit of having a throttle position sensor anyway? What made the manufacturer decide the bikes need this?


If I remember correctly with it connected you will get better throttle response in tight sfuff.

  • clark4131

Posted January 30, 2007 - 10:08 AM

#12

yah i would agree if I didn't know the tech......he's on our side not the so-called yamaha techs that are available to the general public who get confused about the term spoke wrench.


Every now and again you run into one who knows his stuff. You're lucky...SC

  • Chas_M

Posted January 30, 2007 - 02:29 PM

#13

What is the benefit of having a throttle position sensor anyway? What made the manufacturer decide the bikes need this?


The TPS serves to increase the part throttle ignition advance over and above the default advance curve built into the CDI, much like the vacuum advance in auto distributors. Disconnecting the TPS theoretically has little effect on maximum power, i.e. at full throttle the ignition advance is determined by the CDI. The TPS serves to increase part throttle fuel economy and perhaps to enhance part throttle engine response.

  • dominator426

Posted February 21, 2007 - 12:09 PM

#14

Actually, FFRacing79's dyno charts showed how the TPS retards ignition timing up to 5000+ RPM, and again at over 8000 RPM, mostly at 8300 RPM on his YZ450. Disconnecting it eliminates the dip at 8000 rpm and results in a 2 HP increase.
Mine is more prone to pinging without TPS and a bit more touchy at low rpm, so I keep it connected...

  • marcoma

Posted February 27, 2007 - 11:35 PM

#15

Mine is more prone to pinging without TPS and a bit more touchy at low rpm, so I keep it connected...


As is mine....




 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.