Cleaning CT90 Oil Passages

If you do tear into your CT90's engine to replace a piston or do other work it is always a good idea to take a little more time and make sure any and all oil passages are clean and clear before reassembling the motor. An example would be a part like the overhead cam where each of the cam lobes and bearing journals have a hole where oil is provided to the surface while the engine is running.  Oil gets to each of these holes from a bore that starts at the left end of the cam shaft in the picture below and runs to just underneath the hole that is visible in the right most bearing journal. When you have a part like this out of the engine you really need to make sure that there is no dried up crud in the bore or in one of the oil supply holes and you should be able to look down the bore and see light coming through each of the oil supply holes.

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