Wiseco High-Performance Forged Piston Kit with Gaskets - KTM 520/525 SX/EXC (2000-2007) - 95.00mm Bore - HIGH COMPRESSION

Wiseco High-Performance Forged Piston Kit with Gaskets - KTM 520 / 525 SX / EXC - High Compression

Premium Wiseco forged piston kit with complete top-end gasket set for the legendary KTM 520 and 525 big bore thumpers. This is the HIGH COMPRESSION version with 12.5:1 compression ratio for maximum performance!

⚡ High Compression: 12.5:1

This is a high compression piston (12.5:1) designed for riders who want maximum power. Higher compression increases power output but requires premium fuel. Compare to our standard compression kit (11.0:1) if you prefer stock compression.

Kit Includes

• Wiseco Forged Piston (#4732M09500) - Premium 2618 aluminum alloy, high compression
• Ring Set (#9500ZS) - Wiseco performance rings
• Wrist Pin (#S641)
• Wrist Pin Retainer Set (#CW20)
• Top End Gasket Kit (#W5885) - Complete gasket set for top-end rebuild

Key Features

• Premium forged 2618 aluminum alloy construction
• Complete top-end gasket kit included
• High compression 12.5:1 ratio for maximum power
• Standard bore - direct OEM replacement dimensions
• Pistons, rings, wrist pins, and circlips for one complete engine

Important Notes

• High compression - requires premium fuel
• Wiseco ring types are not interchangeable (i.e., CD is not interchangeable with LC)
• Wiseco pistons can be fitted only with Wiseco rings
• Cylinder sleeves must be purchased separately if needed

Piston Specifications

• Bore Size: 95.00 mm (Standard)
• Piston Diameter: 94.92 mm
• Stroke Length: 72.00 mm
• Compression Ratio: 12.5:1 (HIGH COMPRESSION)
• Material: 2618 Aluminum Alloy
• Skirt Coating: Non-Coated
• Style: Forged Series

Engine Specifications

• Displacement: 510cc
• Engine Type: 4-Stroke
• Weight: 1.84 lbs

Fitment

KTM 520:

• 520 SX: 2000-2002
• 520 EXC: 2000-2002
• 520 EXC Racing 4-Stroke: 2000-2002

KTM 525:

• 525 SX: 2003-2006
• 525 EXC: 2003-2007

Standard vs High Compression

This is the HIGH COMPRESSION (12.5:1) kit. If you prefer stock compression for reliability and pump gas compatibility, check out our standard compression kit (11.0:1, SKU 0903-1161).

Why Wiseco?

Wiseco is the gold standard in forged pistons. Their 2618 aluminum alloy pistons are designed for high-performance applications where strength and durability are critical. The high compression piston extracts maximum power from the legendary KTM RFS engine!