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250f problems

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i was riding my 250f the other day...all of a sudden it just died and had no compression...the piston is fine as so is the cylinder, and the valves seem to be fine...everytime i kick it over though air comes out of my intake where the carb goes on...what can you guys tell me about this? and can u tell if valves are bad just by the looks of them?

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What all have you checked? you say the piston, cylinder, valves seem fine. How or what did you do to check them? Have you tried to do a compression check? I personally would pull the head and do a visual inspection if you say you have zero compression. Sounds like something hit it's end of service life.

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hey guys i just put a brand new set of rings on it and it runs good...my timing was a little off and my idle screw on carb...how many turns out is it suppose to be anyhow? it seems like 1/2 turn too far and its totally different bike.

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compression heard thru the intake is a good sign that you've got some issue with the intake valves. We can speculate all we want, but if I heard that, I'd be pulling the head off ....stat.... and ordering parts as riding season is upon us.

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