Throttle Sensor Assy


3 replies to this topic
  • backhoe1

Posted September 12, 2007 - 12:50 PM

#1

can any one tell me about the THROTTLE SENSOR ASSY on my 2001 yz 426 what can the bike do if it don't work

  • Ga426owner

Posted September 12, 2007 - 01:20 PM

#2

can any one tell me about the THROTTLE SENSOR ASSY on my 2001 yz 426


too vague...what do you need to know about it?
part number..
how it works...
what it looks like...
if it is broken...

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • backhoe1

Posted September 12, 2007 - 01:57 PM

#3

Throttle Sensor Assy
if it is broken...how it works...

  • grayracer513

Posted September 12, 2007 - 09:44 PM

#4

Depends what you mean by "broken".

Its function is to increase ignition advance for lighter throttle openings at any given engine speed to improve combustion efficiency, and retard it at heavier throttle to avoid pre-ignition.

If it fails so that it is an open circuit, as if it were unplugged, the CDI defaults to full throttle timing at all times, and controls the timing based only on engine speed.

When it gets ugly is when the TPS output voltage varies erratically as the throttle opens instead of tapering smoothly from high to low. That causes the timing to move around, spiking and dipping in response, which can cause a variety of odd behaviors. If you suspect this, unplug it and try the bike then. If it seems to correct the problem, test the TPS with a meter to see if the resistance increases smoothly as the throttle opened.





Related Content

Reviews

Yamaha YZ450F 2017 by Chris.GVS


Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017
Forums
Photo

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F


Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies
Forums
Photo

Michigan Motocross Tires by 288yz450


Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply
Forums
Photo

Megabomb Fitment by 288yz450


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply
Forums
Photo

Should I buy this bike? help....... by Numsa Hul


Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • * * * * *
  • 10 replies
 
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.