Wiseco WK1328 84mm 2-Stroke Forged Piston Kit for Wet Jet PWC with Top-End Gasket Kit

The Wiseco WK1328 is a 84.00mm bore, 2-stroke forged aluminum piston kit designed for Wet Jet Kraze, Duo, and ZX 700 personal watercraft. This kit includes the piston, rings, wrist pin, and circlips — everything needed for a complete top-end rebuild. Manufacturer part number cross-reference: 3307KD-790M08400.

Why Wiseco Forged Pistons?

• Forged aluminum construction — denser grain structure aligned to part geometry delivers superior strength, impact resistance, and fatigue life compared to cast pistons
• USA-made — pistons are forged in-house at Wiseco's facility, with all forge tooling produced on-site for full process control from raw bar to finished part
• Optimized strength-to-weight ratio — each forging is engineered to maximize performance without adding unnecessary mass
• Skirt coating applied — reduces friction and improves break-in characteristics for longer service life
• In-house dyno testing — designs are validated through rigorous R&D including advanced shapes, coatings, and component development
• Complete kit — includes piston, ring set, wrist pin, and circlips for a straightforward top-end service

Wiseco's 80+ years of powersports piston expertise is behind every WK1328 kit. Backed by industry-leading manufacturing standards, this piston kit is the trusted choice for PWC engine rebuilds demanding proven reliability and performance.