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Yamaha moto 4 110 crank case vent tube spitting oil

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Yamaha moto 4 110 crank case vent tube spitting oil

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  #1  
Old 09-15-2018, 10:57 AM
Weekend Warrior
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Join Date: Sep 2018
Posts: 1
Default Yamaha moto 4 110 crank case vent tube spitting oil

I have a 89 Yamaha moto 4 110 that every time I turn it over it spits oil out even when riding it spits oil out of the vent tube or what I think is the crack case vent tube.
 
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  #2  
Old 09-16-2018, 02:13 AM
Extreme Pro Rider
Join Date: Oct 2013
Location: Lancaster England
Posts: 3,217
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Makers usually run crankcase vent tubes into the airbox, does your vent do this? Is the sump overfilled, as excess oil will be blown out of the vent? Other possibility is badly worn engine, making the crankcase vent gasses blown past the piston, you would get blue smoke from the exhaust, and high oil consumption if this is the case.
 
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