Broken spark plug extraction - '73 CB125

[Spexx]

Hi all - This is my first post here, and I'm also working by very first build. I picked up a pretty decent 1973 CB125 on CL last week for $250. Last night to went to swap the spark plug to see if I could get her to fire up. The plug twisted right apart on me. Basically the threads are still inside the head, but the rest of the plug (including the nut part and anything that I might be able to grab onto) came out of the middle of the plug. What's odd is that none of the ceramic seems to be broken, so I'm guessing that it's just a faulty plug?? I dunno. Any suggestions on how to remove the threads from the head? Ideally I don't want to take the head off so I'm hoping for other ideas.

Thanks!

 

[2_DONE_THE_TON]

First it would be great to upload a pic of the situation you got there.

 

[barnett468]

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did you use much force to remove the plug?

photos are good but my guess is that you will have to turn the bike so the plug is facing directly down then break the porcelain out of it and bend the electrode straight then try an easy out . . it it does not easily turn, vacuum the hole out then turn the bike upright and put some kroil oil or a 50/50 mix of acetone and auto trans fluid on it every 4 hours then try to remove it again 24 hours later.

 

[Spexx]

No I did not use very much force. In fact, the porcelain is all intact. It came out in one piece. Literally just the threads and electrode twisted offtake a look at the pics

http://imgur.com/5xo0aHr
http://imgur.com/pH4huij

 

[Tune-A-Fish]

Yeah that looks like a manufacturer defect to snap off like that, just head over to Lowes or your favorite Harbor Freight and get a set of easy outs:

 

[whynot]

wow^^^^^^I have never seen a spark plug do that.

 

[Spexx]

Alright I'll grab a set of easy outs and let you guys know how it goes. Inauspicious start to my first build. :-\

 

[barnett468]

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you could try grabbing the electrode with narrow needle nose pliers and try to twist it out.

always put a little grease or oil on the plug threads before installation.

 

[DohcBikes]

Inauspicious start to my first build. :-\

Typical start for a first build;-)

Think of it this way. Once you get that plug out of the head, and I know you will, it will be your first small victory and will help you to keep a level head when other things go awry, because they will!

 

[Spexx]

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you could try grabbing the electrode with narrow needle nose pliers and try to twist it out.

always put a little grease or oil on the plug threads before installation.

Good call, I'll try that first!