Husqvarna CR 65 2011-2013 Grade E/F 44.98mm
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Vertex Two-stroke Pistons
Because of a cast piston’s ability to contain higher silicon content compared to forged pistons, and because twostrokes
have lower cylinder pressures when compared to four-strokes, cast pistons are ideal for two-stroke engines.
Vertex pistons are gravity cast from an aluminum alloy with 18% silicon content. Silicon is important because:
• It decreases thermal expansion, which changes the
geometry after the piston reaches operating temperature. With low thermal expansion characteristics, Vertex
pistons can be run at tighter tolerances compared with forged pistons. This creates better power and
performance, also making them less susceptible to rattling or breaking.
• Silicon gives the pistons better wear characteristics and
prolongs piston life by decreasing wear on the piston