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Engine Mechanical TopicsDiscussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
That’s the crankcase breather line that someone ran to the air cleaner. Not wise. I would remove it and just run the line to the bottom of the frame and leave it open. Don’t run too much oil in the tank.
That’s called sumping. The bike probably sat for a while. That allows the oil from the tank to collect in the crankcase. When started, the only place it can go is out the breather. The fix is to run the engine to get the oil pumped back to the tank. Then run the engine more often. Do not add oil to the tank until the case oil is returned to the tank- it will only make it worse by adding more oil.
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