Wiseco Piston Kit 56.00mm 2.00mm Oversize for KTM 125 SX 2001-2021 786M05600

If you're running a KTM 125 SX at the edge of performance, a worn or damaged piston directly throttles your power output and reliability. This Wiseco piston kit delivers the compression ratio stability and bore sealing precision that separates consistent lap times from catastrophic failures. Built for both trail abuse and race-day demands, it's the upgrade serious riders choose when stock components no longer cut it.

The high-silicon aluminum alloy construction handles extreme combustion pressures without sacrificing weight, while the E-coated crown and ring grooves resist wear from thousands of combustion cycles. Installation is straightforward for experienced mechanics, though proper honing and ring gap setup are critical—this isn't a bolt-and-go part. You're investing in the internal foundation that converts fuel into measurable horsepower and torque gains.

• 56.00mm bore diameter
• 2.00mm oversize
• High-silicon aluminum alloy
• E-coated crown
• E-coated ring grooves
• E-coated pin bore
• Includes forged piston
• Includes rings
• Includes wrist pin
• Includes circlips
• Enhanced forging design
• Optimized compression ratio
• Reduced exterior machining
• KTM 125 SX compatible
• 2001–2021 model years
• MPN: 786M05600