Question about 2003 Yamaha YZ 125
I replaced the cylinder and piston and rings on my 1998 yz 125. it started right up and i rode it for about ten minutes then it died and now it wont start back up. also my floats are sticking on my carb. any suggestions.
You may have not tightened coil and coil wire screws enough. 2 strokers are notorious for vibrating their bolts loose. Bad earth will nullify spark. Check for clean connections on all leads from crank to coil and CDI unit. Is plug and cap 100%. Check top end gaskets if any sign of moisture on sparkplug.
The float pin may be worn and extending out past ends and jamming on carby housing. Take out and roll on flat surface and look for defects. Ensure float tab (bears on needle) is not notched from wear or bent too far. Clean seat and needle are essential, replace if suspect. Spray some carby cleaner thru fuel line entry whilst you have floatbowl off to clear any sediment or debris. (especially fuel scale or air filter foam)
Posted on May 04, 2010
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Posted on Jan 02, 2017
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