Bad TPS??
  • Widdy
    Posts:5
    Joined:Sat Jul 07, 2018 12:14 pm
    Bad TPS??

    by Widdy » Thu Jan 30, 2020 10:26 am

    Hi Guys,

    been having carb issues and have checked my TPS as per the Service manual.

    I'm getting a variable response from the blue and yellow wires, when throttle is opened or closed (this is correct as per service manual)

    I was getting no reading from the blue and black wires until I loosened the screw, now it has a reading of 4.7k Ohms no matter how much its moved, even removed it from the carb but still got the same reading.
    Am I right in thinking this should alter slightly depending on small movements?

    cheers
    jay

    ps crf250r 2005
  • Back2-2
    Posts:1148
    Joined:Tue Jan 04, 2011 3:31 pm

    Re: Bad TPS??

    by Back2-2 » Thu Jan 30, 2020 12:23 pm

    Yes it is just a small micro potentiometer. From what you described it does not sound as it is functioning properly. Could be from corrosion or dirt not allowing a good contact on the resistance scale internally. Could be fault in the wires.
    You do not have to use it - the bike will run fine without it and many people remove them for what some feel is better and more reliable performance.
    Neil
    Black Hills of SD
    Life without Motorcycles would just be boring, really boring
    Honda 450X. Yamaha Tracer GT900. HD Fat Boy. Triumph Bonneville. Yamaha Majesty 400. Yamaha Grizzly. Yamaha Wolverine. Yamaha TW200
  • Widdy
    Posts:5
    Joined:Sat Jul 07, 2018 12:14 pm

    Re: Bad TPS??

    by Widdy » Sun Feb 02, 2020 8:53 am

    Yes it is just a small micro potentiometer. From what you described it does not sound as it is functioning properly. Could be from corrosion or dirt not allowing a good contact on the resistance scale internally. Could be fault in the wires.
    You do not have to use it - the bike will run fine without it and many people remove them for what some feel is better and more reliable performance.
    thanks for the reply,it saves me some money and a weight of my mind.

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