Hot Start Plunger

8 replies to this topic
  • WR372

Posted February 10, 2004 - 07:09 PM


The plunger on my 03WR450 has become stripped at the carb. I think I have gotten it tight, but is there a way to check if it is leaking? How hard, what parts do I need to replace/fix this?


  • Indy_WR450

Posted February 10, 2004 - 07:33 PM


The hot start plunger is a cheap fix with a new plastic threaded nut assembly you can order from your dealer real cheap. The plastic thread strips very easily! Do not over tighten :)

  • _Blue_Mule_

Posted February 10, 2004 - 07:37 PM


you might try soap and water, put suds around it while running :)

  • oldbones

Posted February 11, 2004 - 02:50 AM


NO! Do not do that! There is not a positive pressure in the carb, it will suck the soap in, not blow bubbles out like a leaky inner tube.

To check for intake leaks, I have heard spray the spot with WD40 or starting fluid and listen for changes in engine RPM.

I just replaced my hot start last night with an solenoid operated, handlebar mounted push-button activated unit. Pretty slick! PM me if you wanna know more.

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  • WR372

Posted February 11, 2004 - 09:44 AM


How do you separate the threaded nut from the tube?

  • Indy_WR450

Posted February 11, 2004 - 01:10 PM


Take the cable off and it slides all the way to the other end and off. Put the new one on! :)

  • KiwiThumper

Posted February 12, 2004 - 10:36 AM


I dont know about you guys, but I never, repeat never use my hotstart, never needed to and dont intend to start.
What I am about to embark on is a z-start clutch (thanks and qdos to Desertfoxx for sorting the fedexing !! :) ) but I want to remove the hotstart totally as I will be taking the clutch perch and lever off.
Can I just undo the cable and leave the plunger in? :D
Or is there a better way?

Cheers Deano

  • Indy_WR450

Posted February 12, 2004 - 03:34 PM


No you need to plug the hole with a steel pin and then put the cap on.

  • KiwiThumper

Posted February 12, 2004 - 03:58 PM


OK thanks Indy


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