Question about 1974 Yamaha DT 360

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Oil in my air filter?

I have an Yamaha DT 360, is it normal to have oil in my air filter? It's not running to good, so I decided to replace the plugs and noticed this. I haven't noticed this before. And why would I have this issue? Please can someone help me with this. John

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This is normal. The air filter is re usable on a lot of two stroke engines and you wash the filter and oil it lightly to help catch dust.

Posted on Feb 14, 2009

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Might be what they call a wet air filter. Check with the dealer before installing a dry filter.

Posted on May 04, 2009

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This is a common problem with Yamaha . Perhaps it's common on large capacity V-Twins. Check the crankcase ventilation hoses/system.

Posted on Nov 10, 2008

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Some filters do require a little oil like thK & N ones maybe in your bike it was over filled if at all.
You can run the engine with out the air fliter and see if theres smoke coming out of the breather pipe, if it does thn you will have to replace the piston rings or more over rebore the block and replace the piston kit.

Hope this helps !


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Oil in my air filter


so I decided to replace the plugs and noticed this. I haven't noticed this before. And why would I have this issue? Please can someone help me with this. JohnThis is a common problem with aprilia Perhaps it's common on large capacity V-Twins. Check the crankcase ventilation hoses/system,

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