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Have a 1999 ktm 65 sx we have spark and its getting gas but cannt get it to fire can u please help us.

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Does she seam to have good compression? The standard rules apply, fuel, spark/timing, compression. If you have fuel in the chambers and you believe the spark is right, next worry is compression. How good are the rings. If she has been sitting for a time the piston / rings may still be a bit dry or maybe a bit stuck. mix a bit of gas with a bit of oil and again squirt into the cylinders, or use wd40; down the spark plug hole and spin the engine, and let it sit a bit before trying to start it. . That is about all you can do to find out what is going on. Be sure you are getting fuel into the chambers, get a syringe and spray it in past the throttle valves.

Posted on Mar 30, 2011

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Posted on Jan 02, 2017

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I've got a KTM 125sx 2002 I've done a top end rebuild piston etc and put a new coil and plug on it and the bike won't start with the kicker, only with a bump start took the plug out and its got a weak


Hi, Ian and the usual suspects are:
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