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Hi my ktm 450 is blowing blue smoke loosing oil but still has lots of compression what do u think is wrong anyone

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yup, time to tear it apart and either replace the rings, or the whole piston + rings.

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Did the problem start immediately, or did it gradually get worse with continued use?  There are multiple piston rings on 4-storkes, some to control oil and some for compression.  Also a 4-stroke has valve stem seals that can leak oil and cause oil burning.  If the bike just has lots of hours on it then it's probably time for a rebuild.  If the bike is new, then maybe the valve stem seals just went bad.  In this case remove the throttle body and exhaust pipe and shine a flashlight in there and look for oil running down the valve stems.  If something major happened (bad overheat, etc...) then it's time to take it apart and inspect.

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How old is the bike, how many hours? One of my friends had a 2007 exc and it blew blue smoke every time he crashed. Some sort of breather tube was feeding oil into the intake. It would go away after a about 5 minutes. If its always blowing smoke then I agree with the others.

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