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Posted

I have an '88 Banshee with 34mm PJ's and my right cylinder since I have had it smoked more than the left. It have never noticed any oil leaking out of the engine on that side and now my left side cylinder is running very lean. I only ran it down the road through the gears, but the plug in the left side looked brand new still and the right was covered in oil like it was rich. Could my crank bearing be out or do they always leak oil when bad?

Posted

Its not the bearing going out. Its the seal going bad, it is letting trans oil into the cylinder. That is why your plug is oily. That mean you will have to split the case's to get the seal out. But while you are in there check the crank bearings. That is the time to change them when its all apart.

Posted

Before you do anything do a leak down test... it could have just been from using way more oil during reassembly on the right side than the left.

Posted

I don't think the oil is from reassembly, I haven't rebuilt it or anything. It ran pretty good when I first bought it and it has gotten progressively worse over time. I was just wondering if when the crank seals go out that they always leak oil on the right side?

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