You Gotta Be Kidding Me!

Talk about getting the shock of my life...I too thought I blew my bike up...

I however was on ICE when mine went missing.

I was in the middle of the lake and had to push it home... It's hard to push a bike when you are standing on ice with sneakers on and the tires have 1/2 inch spikes......and the boat ramp is covered in crusty snow.

Disclaimer: I ride the ice with sneakers on cuz I can feel the release point way better than if I ride with boots. I don't race I just do it for fun.

Replaced with the TT aftermarket plug and have been good to go since...

So, what you are saying is...

One day, my 2004 WR450 will just decide to eject this plug, even though it has over 1000 miles on it? :thumbsup:

Mine has over 7000kms around 4,500miles at a guess and my plug is still fine, probably fall out day I guess.

I hope I dont sound like an idiot when I say, What plug are we talking about. I have an 02 wr426, but I have never heard of this potential issue with the wr's. I have 1300 mi on mine.

I don't know if the '02's have this issue, but I guess if the bike doesn't have a compression release lever (not the hot start lever, that's different) then you are effected. Look right above the exhaust manifold (like an inch). If there's a circular protrusion on the side of the head (facing forward) with a set screw sticking out to the right - see what's in the forward facing opening at the front of that protrusion. If it feels like rubber or soft plastic you may want to shore it up.

:thumbsup:

The 426's have the decompression system in place of the hole that is sealed up with rubber grommets on 03 and upwards.

Yes I agree the rubber gromet is shite but I would check that your engine breather hose isn't blocked as this could cause an increase in pressure, causing the plug to exit

I have an 03 and it has never came out but when my buddy lost his on his YZ a couple of years ago I thought I should do something to prevent it. I took a small piece of tin and bent it into an L shape and attached it using the small screw that is on the side of it. Therefore it holds it in.

Nope. No plug after '04.

So on my '04 YZ 450 you guys suggest changing out this plastic plug for the aluminum one from the TT store?

Dirty

can someone post a picture where this is located?

can someone post a picture where this is located?

It's located above where the exhaust header attaches to the cylinder. I didn't know either until about an hour ago. Finished changing my oil and fired the bike up. Clouds of smoke start coming off and oil is dripping from the front of the cylinder. Thank God this happened in my driveway. If it happened while I was out riding, I would have been completely screwed.

Jerry

Update: 18mm steel freeze plug was 81 cents at CarQuest. Fit perfect.

I have an 03 and it has never came out but when my buddy lost his on his YZ a couple of years ago I thought I should do something to prevent it. I took a small piece of tin and bent it into an L shape and attached it using the small screw that is on the side of it. Therefore it holds it in.

This is what I'm going to do. Can someone tell me if removing and re-installing the bolt next to the "plug" will have any adverse effects. Is it an adjustment for anything or can I just remove it, install the retaining bracket and re-install the bolt? Paranoid? Yeah, a little.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now