18.3421 ProX Inner Clutch Hub for Suzuki RM-Z450 2016-2026 RMZ450 RMZ 450

Prox Inner Clutch Hub for Suzuki

The Prox Inner Clutch Hub for Suzuki is a replacement clutch basket component that anchors the clutch plates and transfers drive from the engine to the transmission on RM-Z450 models from 2016 through 2026.

Overview

The Prox Inner Clutch Hub for Suzuki is built to replace a worn or notched original hub on RM-Z450 motocross bikes. This inner clutch hub engages the clutch plates and helps deliver smooth, consistent power to the transmission under hard riding. It is aimed at riders and mechanics servicing RMZ450 machines who want a durable replacement part for the clutch assembly, and it references part number 18.3421.

Built For Performance

• Precision-machined hub body for accurate plate seating
• Constructed from hardened material to resist wear from repeated clutch engagement
• Designed as a direct replacement for the original hub on the listed models
• Helps restore smooth clutch operation when the original hub is notched or worn
• Sold as a single inner clutch hub unit

Fits These Machines

• for Suzuki RM-Z450, 2016-2026
• for Suzuki RMZ450
• for Suzuki RMZ 450

On-The-Job Use

• Clutch rebuilds and refresh work on RM-Z450 motocross bikes
• Routine servicing when the original hub shows notching or wear
• Race bike maintenance where consistent clutch feel matters
• Workshop repairs and replacement part stocking

Specs At A Glance

Good To Know

Q: Does this hub include clutch plates or springs? A: No, this listing is for the inner clutch hub only, so plates, springs, and other clutch components must be sourced separately.

Q: Will this fit every RM-Z450? A: It is listed for the 2016-2026 range, but fit can vary by year and serial number, so verify your machine before ordering.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.