Motorcycle Crankcase Cover Repair

Video showing how to replace a bronken crankcase cover in a motorcycle.

Motorcycle crankcase cover repair.

The first order of business for this new rm125 project is to repair the damage to the crankcase. There are two main reasons why a motorcycle leaks oil. I am looking for suggestions on how if possible to make a reliable long term repair on a crankcase puncture. Cut a piece of scrap aluminum to cover the hole.

The first reason would be faulty gaskets found on the oil pan valve cover crankcase or the cylinder head of the engine. The second most common place for oil to leak is from faulty plugs such as the oil drain plug crankcase side plugs and valve cover plugs. Repair cracked cases text and pictures by mark trotta. I could have spent more money and bought another left side c.

To repair cracked cases correctly the case halves need to be separated which requires the top end of the motor to be removed. The ignition cover of my off road motorcycle is a magnesium casting. Designed to give new life to your main engine seal it can help reduce or completely stop motorcycle engine oil leaks with little hassle. Use a circular saw with a carbide blade to cut the aluminum so that you end up with a rectangle that will cover the hole in the crankcase and extend at least 1 inch beyond the hole on all sides.

Video showing how to replace a bronken crankcase cover in a motorcycle. Do this by using c clamps to clamp a sheet of aluminum to a work table. When confronted with a cracked engine case the motorcycle restorer has two options find a replacement or have the case welded. I hit a rock and it drove a bolt from my skid plate into the bottom of the crankcase and made a small puncture.