Question about 2004 ATK 500 Intimidator

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Spitin oil and smoke

I've been working on a mx 450 I've adopted this winter. When I start it up it blows some blueish smoke for the first minute or so and I have also notice it spitting oil out filler overflow tube. How much of this is normal? Oil doesn't indicate it being too full. Sounds like rings and scoring?

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Oil is too full or scavenge pump is not pumping properly. Look down into the oil fill hole in the frame do you see oil flowing? If the oil is too full or the scavenge pump is not pumping then crankcase pressure is increased to the point where it starts blowing oil out of the vent into the airbox area... I would go with oil being too full. Drain the oil from the frame and engine and add 1 qt, perhaps a HAIR over, but not 1.5qts. 1.5qts is always too much for ours, I barely go over 1 qt. We have about 18 Dales in our group that we ride with, so we are used to seeing this.,,,

Posted on Nov 10, 2008

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If you have a rad on that unit you have a warped head and the water is leaking into the piston.... stop using immediately as this problem will lead to major engine problem as water does not compress and will either crack the head or blow the Rings.. if no rad then check to see if there is water in the gas.... if neither then it is probably oil burning but that smoke should be blueish...

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1989 1100cc virago sat for 9 months after being winterized so no liquids were in it. added oil, gas and new battery. got it to start and it blew massive blue smoke. then it quit. went for a ride around the...


When you say blue smoke, I assume you're meaning oil burning. Is there a characteristic oil burning smell to the smoke? Have you checked the compression? The blue smoke sounds like it could be caused by sticking rings. I personally never store a bike completely dry. I would change the oil before storage, fog the cylinders or run an ounce or two of oil through them with the plugs out, replace the plugs and, depending upon the anticipated duration of storage, either fill the tank with stabilizer and Marvel Mystery oil added to the fuel or drain the tank. A more likely scenario is that the smoke you're seeing is caused by carburetor floats not rising enough to keep the fuel in the bowl at the correct level. As far as the fuses blowing, you will need to isolate each circuit and trace it through. It's possible your wiring could have been chewed up by mice.

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