Tell me about engine cases

2007 yz 250

Is there some sort of coating on the exterior of the cases? Mine are looking pretty shabby. Can I blast them, or will it remove a protective coating? Same goes with pv and water pump cover.

So far I 'm aware there is no protective coating

The cases are coated with some type of clear-coating to prevent corrosion. You can sand blast them but you will need to clear coat or paint them afterwards. There is a procedure to prepare aluminum for paint but I have had good luck just painting with rattle cans (Rustoleum, etc).

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