help with blue/white smoke while hitting the throttle in nuetral

but no smoke under a load, no noticable performance drop, also looks like a little wet oil on tip of the exhaust, this just started while riding today, please help i am new to the fourstrokes, bike is a 03 450f

MY 400 DID THE SAME THING IT WAS WORN VALVE STEM SEALS BUT IT COULD ALSO BE WORN OIL RING LETTING OIL BLOW BY WHEN YOU REV THE BIKE LESS OIL GETS BY AND EXHAUST GOES OUT FASTER SO YOU DO NOT SEE THE SMOKE ANNYMORE. THIS IS A SIGN THAT YOUR TOP END MAY NEED TO BE RE RUNG.

^^^^^

what he said!

if this is the case, should i stop riding it at all and what would be a ballpark price for a top end rebuilt

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