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Kits are cast aluminum alloy (not forged) with an 18-20% silicone
content, which
produces a light but strong piston. Piston skirts are Bisulphide-coated
for faster break-
in time and increased piston life. All pistons are heat-treated with
a T-5 hardening and
tempering cycle
. Standard pistons and components are O.E.M. replacements
. Most Vertex pistons are made for standard size cylinder only, except the
CR500,
Banshee and Blaster
. A, B, C, and D piston sizes are 0.01mm variations in the piston size to
increase or
decrease the clearance within the cylinder, except for overbores
. Race pistons are available for a variety of models and are built for higher compression
and more horsepower.
. A single ring is used on all
race
pistons reducing frictional drag and giving higher RPMs
. Race gas is recommended for all Vertex race pistons
. Kits include piston, ring, piston pin (wrist pin) and circlips
. Replacement rings are sold individually, order 2 for dual-ring pistons
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