WR450 Spark Plug?

4 replies to this topic
  • KentuckyWR

Posted December 03, 2003 - 08:05 AM


Trying to be prepared . . .
I bought two spare plugs for my WR450.
I then was told by a WR426 owner that a standard plug sockect wouldn't fit all the way down into the head.
My dealer gave me a plug socket that will probably work (thin walled) but then I got to the real problem.
I can get the spark plug cap/coil to lift fully out of the head.
It hits the frame before I get the needed clearance.
Can that plug cap/coil be seperated into two pieces?
Is there something simple I am missing here?
What a poor design!
Hopefully I won't need to replace a plug (especially on the trail) except a couple times a year for maintenance. I NEVER fouled a plug on my XR600s in over 12 years of riding them . . . but I always had a couple spares and the tools necessary to change it just in case!

  • Indy_WR450

Posted December 03, 2003 - 08:29 AM


You have to pull it off and bend it away from the frame as you lift up. It is snug but it does come off. :)

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  • KentuckyWR

Posted December 03, 2003 - 09:53 AM


I'll try again this afternoon.
I just hate to apply too much force if not necessary.

  • KentuckyWR

Posted December 03, 2003 - 02:25 PM


It does come out but with a little more force than I'd like especially since it is an expensive little item. And a standard Craftsman spark plug socket with a small extension will reach and remove the plug.
Not a problem! Just gotta tug and wiggle a little to get it out! :)

  • dave450wr

Posted December 04, 2003 - 02:17 AM


I had trouble getting my plug/coil cap out too.IT DOES COME OUT , but it's a tight fit.As for getting the plug undone the socket supplied from yamaha works a treat,Just hope i dont have to do it on the trail.


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