wr450 surging

4 replies to this topic
  • Halfy

Posted September 17, 2010 - 11:03 PM


Hi all, I've recently made the switch to 4-stroke and just bought an '08 WR450F and i've noticed when riding at a constant speed on a flat road that it tends to surge a bit, does anyone have any tips on where to start? does it sound like a fuel problem?

  • miweber929

Posted September 18, 2010 - 04:34 AM


Search the forums, common problem, been addressed many times.

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  • CanadianWR450

Posted September 18, 2010 - 07:17 AM


Look for TPS stutter

  • klossWR450

Posted September 20, 2010 - 02:12 PM


as above, disconnecting the TPS sensor should sort it out

  • MaddogYZ

Posted September 20, 2010 - 04:28 PM


as above, disconnecting the TPS sensor should sort it out

Before you simply disconnect it I would go through the TPS checks that are clearly instructed in your manual. Even a bafoon with a multimeter can do the checks with a buddy to help hold one of the probes. The system checks really do work too, my bike had a steady throttle stutter that I ignored and dealt with for two years :worthy:. Two weeks ago I did the TPS checks and it was slightly out of adjusment (.89V I think), adjusted it to middle spec and it runs smooth as silk now :ride::banghead:. Such an idiot for not checking it earlier.


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