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1. if the engine will not turn over (the kickstart wont move) then it is siezed either top or bottom end. 2.if you start it up and you hear a loud clicking noise that is louder than normal then chances are that you snapped a valve and there will be no compression. 3.if you simply done have any power there are many possibilityes but the main cause would be you need new rings and or your valves need checked. both of these things would allow air to pass through and lessen your compression.

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Q: How do you tell if a 2004 yz250f engine is blown?
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