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Post by Bashan on Aug 5, 2011 14:28:42 GMT -6
I think Sprocket hit it with the valve guide at the start of this thread. He's scarey. 
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Scooter Doc
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Post by sprocket on Aug 5, 2011 17:57:20 GMT -6
Be afraid... be very afraid... ;-)
had it happen... seen it 4 times...popped a valve guide
That's my story and I'm stickin' to it!
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Clinician
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My 200 Quit
by: fljohnboy - Aug 5, 2011 21:32:33 GMT -6
Post by fljohnboy on Aug 5, 2011 21:32:33 GMT -6
Is the popped valve guide fixable and if so how?
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Post by Bashan on Aug 6, 2011 2:18:47 GMT -6
Yes they're fixable but ordinarily it's easy and cheap to buy a complete head ready to go. However, on that motor I don't know. Do you know someplace to get parts? Rich
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Post by fljohnboy on Aug 6, 2011 7:42:52 GMT -6
I will have to look at replacing the head. From what I understand a 150 GY6 is the same except for the bore. I will have to verify this. I will call BMS.
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Scooter Doc
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Post by sprocket on Aug 6, 2011 10:14:05 GMT -6
Valve guides are fixable.. but you have to heat the head to replace them... as I recall they are heat soaked in an oven to 350 degF which can be done in a kitchen oven.. but they tend to smoke like crazy
I'm not positive this is your problem however, but from what you are saying is sounds like it could be.
Have you run a compression check on the engine.. that should tell you is the valve is leaking...
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My 200 Quit
by: fljohnboy - Aug 6, 2011 11:45:09 GMT -6
Post by fljohnboy on Aug 6, 2011 11:45:09 GMT -6
Last night I got frustrated and left it alone. Today I take valve cover off and sure enough exhaust valve tight. This time I set the valve at .006 and turned crank over with kick starter to see if it would lock up. I kept turning it about 6 times and no valve lockup. I tightened the crap out of that nut. Put cover back on and bike started. I let it run for about 10 minutes. So maybe it's fixed we'll see. I tried adjusting the a/f not the idle adjustment. Doesn't seem to do much screwing the thing in or out. Had to turn idle screw pretty far down to get it to idle at 2000.
I turned the a/f about 2 turns from stop then turned it in a little at a time and it seems like it picked up a little rpm at a complete turn in of the a/f screw.
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by: fljohnboy - Aug 10, 2011 12:33:31 GMT -6
Post by fljohnboy on Aug 10, 2011 12:33:31 GMT -6
I got everything put back together and took bike out today a few times around the block. It's running as good as it was before this issue. So I guess the bottom line to this whole thing was that exhaust valve adjuster.
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