Wiseco PK1230 Top-End Piston Kit Honda - 54.00mm 9.4 1 XR/CRF100

The Wiseco PK1230 is a complete top-end piston kit designed for Honda XR100 and CRF100 dirt bikes, featuring a 54.00mm bore and 9.4:1 compression ratio. Built entirely in the USA, this kit delivers the strength, precision, and durability that Wiseco forged pistons are renowned for in the powersports industry.

Kit Includes:

• Forged aluminum piston (54.00mm / +1.00mm oversize)
• Piston rings
• Wrist pin
• Circlips
• Top-end gasket kit

Key Features:

• Forged high-silicon, low-expansion aluminum construction for superior strength, reduced weight, improved heat transfer, and longer service life
• 9.4:1 compression ratio — optimized for reliable performance on pump fuel
• Diamond-turned finish from CNC-controlled turning centers ensures a precise bore fit with no size variation
• Armor Glide skirt coating reduces friction and noise while contributing to increased horsepower output
• Compatible with cast iron, chrome, Nikasil, and boron composite cylinder bore compositions
• Dedicated forging design optimizes the strength-to-weight ratio for each specific application
• Wiseco rings, wrist pin, and circlips are included and engineered specifically for this piston — do not interchange with other ring types

Wiseco's in-house forging process aligns the grain structure of the aluminum to the geometry of the part, producing condensed grain flow that dramatically improves resistance to impact and fatigue compared to brittle cast pistons. This makes the PK1230 an ideal choice for trail riding, trail racing, and hard enduro use where engine reliability is critical. Wiseco pistons are made in the USA on state-of-the-art forging presses and backed by decades of motorsport development.