Jetting.. once again..

11 replies to this topic
  • OlaGB

Posted November 25, 2005 - 06:59 AM


Jetting.. once again.. Only a little problem.

Installed JD kit, zip ty screw, hotcams in/ex, and a FMFq slipon.

Everything works great.. Going with 170mj, blue needle 4th clip. The rest is stock.

But when i am riding at normal speeds on the road, say 40-50mph, the enginge miss a little.. Almost as a plug/spark problem.. Every 10-15`th second it get 1 little miss.. a little more throttle, and nothing`s wrong..
Great response as well..

Is it the needle that needs to be down/up 1 clip, or do i need to change pilot jets or something else?

  • clark4131

Posted November 25, 2005 - 07:08 AM


Sounds like the TPS. Disconnect it and see if it goes away...SC

  • tony1970

Posted November 25, 2005 - 12:08 PM


If the TPS does not work try the red needle on the 4th or 5th clip. I had studder problems with the blue at 4th and 3rd. After installing the red at 4 cleaned right up. Good luck.

  • Matty05

Posted November 25, 2005 - 07:00 PM


Sounds like you are rich. Drop your needle 1 clip.
miss won't ever be tps

  • OlaGB

Posted December 03, 2005 - 06:29 AM


Thank you for great help! Dropped the needle 1clip, and adjusted fuel screm from 1 3/4 down to 1turn..

Much better!

  • Matty05

Posted December 04, 2005 - 05:51 PM


Nice to hear!
Remember, rich will run rough like you experienced and lean will make it run like it is breathing real hard and won't pick up speed easily.

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  • WheelsUp

Posted December 04, 2005 - 06:12 PM


You have clipped the grey wire, right?

  • stanleigh12

Posted December 04, 2005 - 07:15 PM


Is the White Bros pipe on my 01 426F compatible to place on a 05 WR 450?


  • Matty05

Posted December 04, 2005 - 08:32 PM


Is the White Bros pipe on my 01 426F compatible to place on a 05 WR 450?


no, only '03 - '05 same.

  • OlaGB

Posted December 04, 2005 - 09:59 PM


I `ve got an european WR, so i don`t think the cutting of the grey wire would work on mine?


  • Matty05

Posted December 04, 2005 - 10:35 PM


Just pull it out of the harness. Don't cut it. Wrap some electrical tape around it.
You can reconnect it up if it does nothing for you.

  • OlaGB

Posted December 05, 2005 - 06:28 AM


Hmm ok, i will look into some threads about it for locating it, and try cutting it..


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