Quote:
Originally Posted by 2weelz
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Engine suddenly quit while merging into freeway traffic. I don't remember feeling any engine braking; it just lost power and the red light went on. It cranked but would not start again. I want to check the compression first to see if there is major engine damage--the lack of engine braking makes me suspicious. If it has decent compression, then I check for spark and gas.........
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The causes of the problem can be much more than sudden lack of compression, which in this case can only be due to:
* Open/leaky valve during compression stroke.
* Perforated piston crown (due to incorrect spark plug grade).
Please Paul, see:
http://www.dansmc.com/leakdown.htm
http://www.dansmc.com/compression_test.htm
http://faq.ninja250.org/wiki/Troubleshooting
