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Hello everyone! Here are the few steps to change your piston on your motocross, in 2 strokes! This time I am using a Yamaha 250 YZ again. After removing the seat, tank, gills, radiators, etc. I will show you how to disconnect your exhaust valves from the bottom of the engine and thus be able to free the cylinder. With your new piston/rings, remember to get these parts: New needle cage New base gasket and cylinder head gaskets My bike: 250 YZ Instagram: / joonycashh Facebook: / joonycashh