Video: How To Repair A Cracked Crankcase Cover On Your Dirt Bike


I Put A Hole My Crankcase Cover Because I Crash A Lot

I’ve cracked a few crankcase covers over the years, but this is the first time I’ve managed to crack one from inside of the cover.

Of course, I didn’t notice the crack until after I got back to my truck, meaning I put another half hour on my internals with no oil… yay… because now I get to replace 5-hour old bearings.

I pulled the cover and found that the shift shaft was the cause of my new case breather.

Related: Have you ever wondered how 2-strokes keep fuel and air in the case before it’s pushed up into the cylinder?

I must have laid my bike down in just the wrong angle to punch the shaft hard enough against the case to break.

So if you find yourself with a fresh crack in your cover, here’s how to fix it.

Here’s The Full JB Weld Rant

You can get all the parts and tools you need through our partner links!

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