Vertex Piston Kit SX65 09-22/TC65 17-22/MC65 21-22 RACE EVOLUTION (44.97) IMPROVED TOP LAND NITRIDED RINGS EXCLUSIVE Mo52 COATING FOR RACING APPLICATIONS Because of a cast piston’s ability to contain higher silicon content compared to forged pistons, and because two strokes 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 skirt.

Majority of our listings are for a direct replacement for your original part.
Our parts are made of quality and are designed to meet or exceed the original OEM Standards.
Our products are often a cost effective alternative to genuine OEM Parts.

Please note � the models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing.
Also, we cannot guarantee fitment to any non-UK models.