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Discussion Starter · #1 ·
so as a first motorcycle I bought a good condition 1981 Honda cm400c. I went to go check on it the other day and there was some type of substance below the motorcycle for example I picked it up with some napkins and it was a brown to light brownish color and wondering what this any ideas or advice
 

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Smell it, then open the oil cap and smell that. Used engine oil has a smell.
 

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While it probably is oil, you want to know where it came from. Most Hondas don't leak oil. So it might have come from your oil overflow as a result of gas leaking into your oil. Take the oil on your dipstick, rub it between your fingers and, if it starts to disappear that means it contains gas, and you have a serious problem.
 

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It could just be oil vapors dripping from the crankcase vent tube. But yes, make sure you are checking the oil level properly (usually with the bike upright), and the crankcase is not overfilled.
 
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