Wiseco 4947M10000 KTM Forged Piston Kit - 505SX-F/XC-F 100mm 12.5 1

The Wiseco 4947M10000 is a high-performance forged piston kit designed for KTM 505SX-F, 505XC-F, and 505 SX ATV applications. Forged from a high-silicon aluminum alloy, this piston delivers exceptional strength, thermal stability, and long-term durability under demanding race conditions.

Wiseco's innovative forging geometry and precision-shaped piston skirt are engineered to reduce friction and maximize power transfer, resulting in improved horsepower and torque across the RPM range. The 12.5:1 compression ratio makes this piston an ideal choice for riders seeking peak performance from their KTM 505 engine.

Kit Includes:

• Forged high-silicon aluminum piston (100mm bore)
• Piston rings
• Wrist pin
• Circlips

Key Features:

• Forged high-silicon aluminum alloy construction for maximum strength and heat resistance
• 12.5:1 compression ratio for optimized high-performance output
• 100mm bore diameter — oversize pistons require cylinder re-sleeving or boring
• Precision skirt profile reduces friction and improves ring seal
• Complete kit includes rings, pin, and circlips — ready to install
• Manufactured to OEM and beyond tolerances for reliable, consistent performance

Wiseco is a trusted name in aftermarket forged pistons for motocross, off-road, and ATV racing. The 4947M10000 is built to withstand the extreme demands of high-compression, high-revving four-stroke engines.