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Yamaha dt 125 r oily spark plug

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My spark plug is oily, I premix my fuel so that is not issue. I am worried it might be crank seal but I am not sure... And it produces some strange rattling noise coming from cylinder maybe top bearing?

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What ratio do you mix it to?

I'd guess that may actually be the issue. Yamaha spent god knows how much money developing an auto pump system to deliver the right amount of oil at all rpm's so why not use it?

 

As for the rattling noise, the only way to find out is to strip and inspect the top end for a start.

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34 minutes ago, finnerz89 said:

What ratio do you mix it to?

I'd guess that may actually be the issue. Yamaha spent god knows how much money developing an auto pump system to deliver the right amount of oil at all rpm's so why not use it?

+1

Pre mix is exactly the reason you have an oily plug.. What ratio do you use..?

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