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  #1  
Old 01-21-2013, 05:30 PM
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Default Engine problem

     

On my 1986 cr125 I was riding and then the back tire grabbed
And let go so I kept riding well 10 minutes later the bike shut off and I can't push the kick down or put it in gear and the back tire does not spin any help please?
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Old 01-21-2013, 05:47 PM
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Most likely cause-you have fried your piston. Take exhaust off and look at the piston through the ports, if it's scored real bad then it's probably seized.
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Old 01-21-2013, 06:17 PM
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Thanx for the info I also forgot to mention that the clutch has no play to it I just don't get it cuz the bike ran fine all day but I will check that piston though
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Old 01-21-2013, 06:26 PM
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A seized piston won't show signs of breaking down til it goes.
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Old 01-21-2013, 07:12 PM
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What would explain the clutch though? It has no pressure what so ever
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Old 01-21-2013, 07:31 PM
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The clutch pulls like it isn't there?? Is that what u r saying or it just isn't dissengaging after this lock up?

Regardless If it locked up it needs to be pulled apart...start by pulling your exhaust like stated to c the top if it doesn't look cooked then pull clutch cover to c if anything is wrong there if not tear it down u will find it eventually
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Old 01-21-2013, 08:00 PM
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No the clutch pulls like it isn't there that's correct. Thanx for the info bro imma tear it down tommorow and see what happens may just go with a big bore kit if I can find one for that bike
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Old 01-21-2013, 08:24 PM
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Possible broken main shaft. bike wont roll in neutral?
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Old 01-21-2013, 08:41 PM
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Na the bike won't even let me shift it into any gear it's like it's stuck and the clutch lever doesn't have tension, the kick won't go down and the rear tire doesn't roll at all 0.o
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Old 01-21-2013, 08:45 PM
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its transmission related it sounds like. the clutch is mounted on the mainshaft. no telling how much needs replacement without a teardown. you need a flywheel puller and a manual.
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