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GENE426

Yz450 decompresion plug

13 posts in this topic

My bike is dripping oil and I cant remember what the compresion release plug looks like so I dont know if it fell out or not?

does someone have a pic of the plug being in?

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It has oil on the bottom right side of the rediator and is dripping on the hedder,

Where can the oil come from?

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Above the header, at about 10 or 11 o'clock to the pipe, on the front of the head, is a bore that used to accommodate the compression release shaft. There should be a plug in there, flush with the outside of the head. If you can see a hole, or stick a finger in it, the plug is gone.

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yea it will be even with the bottom of the radiator almost but on the head

sounds like it has come out by the way the oil is hitting the rad and the pipe

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My bike is dripping oil and I cant remember what the compresion release plug looks like so I dont know if it fell out or not?

does someone have a pic of the plug being in?

Gene, I have a picture of mine with it saftey wired but photobucket is not working right now so I can't up load the pic's . Pm me with your e-mail address and I'll send it to you.

Tnl.

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It's item 15 in this illustration:

partimage.gifx?d=52815,2,0

Note that it isn't on the cylinder head page. That's why it's so hard to locate.

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Well I can stick my finger in the hole, So now what

Is it just a case of getting a new plug part #15 and putting the plug back in or could it have damaged the motor at all???????

There was not much dirt near it to my supprise.....

what do yall think

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You can put the same thing back, but it will come out again. Look for something pinching or blocking the breather hose. especially the metal clips that hold it to the frame.

Replacement options include the TT plug from the Store, or an 18mm cup plug (freeze plug, expansion plug). This is discussed in detail in the thread below. Read through it.

http://www.thumpertalk.com/forum/showthread.php?p=3954235#post3954235

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If I order that TT Plug I just remove the bolt insert the plug and replace the bolt Right?

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that is the only thing that could be leaking right?

Engine looks clean and I cant think of another place for oil to come from?

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It's probably the only thing that is, and it certainly is if the plug is missing, but it isn't the only thing that could be leaking. The cam cover could leak, but it's doubtful that it would. I'll go out on a limb and promise you that the plug will solve your problem.

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