air cleaner full of oil

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air cleaner full of oil

This is a discussion on air cleaner full of oil within the Yamaha TTR50 forums, part of the General Talk category; I got this 50 used for my kids. Checked the air filter this morning and oil ran out of the air box. I cant imagine ...

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    garyrapp55's Avatar

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    air cleaner full of oil

    I got this 50 used for my kids. Checked the air filter this morning and oil ran out of the air box. I cant imagine where this oil is coming from. I understand dampening the element with oil so it attracts dust/dirt but this was very overly oiled. Could this oil be coming from somewhere else? How on earth could oil come all the way up from the crank case and into the air box, I don't see it? Also, on the air box there is a drain hose that is crimped at the end, what is the purpose of this?

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    Yagatogi's Avatar

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    The oil is most likely gummed up old fuel. That's what tanks and carbs are like if you keep old fuel in it.

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    NHrider's Avatar

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    My son's did the same thing! The machine started running like crap and then I noticed the smoke. I pulled the air cover and it was full! The oil is transmission oil coming up from the crank case. That explains why I notice the oil was lower. I replaced the crimped drain hose with something longer that vented down near the swing arm. I may remove the hose from the crank to air box and route the hose higher up on the frame with a filter on the end. I'll see how this goes for now. The kids tip the bike over and they are not very fast and shutting the bike off. I do not think that helps.

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    Wandell's Avatar

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    Also, if an air filter is oiled with motor oil, rather than filter oil it can run out. It's pretty easy to tell if motor oil or filter oil was used on the air filter. Filter oil is extremely sticky while motor oil is well, just oily.

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