Multiquip 40121 CVT Upper Module Flyweight Assembly Orange

The Multiquip 40121 CVT Upper Module Flyweight Assembly Orange is a genuine OEM component designed for EHHNK5 series ride-on power trowels. This is a direct OEM replacement sourced from Multiquip, ensuring the correct specification, color coding, and fit for the CVT drive system on your machine. The 40121 is engineered to match the original assembly exactly, maintaining the balance and engagement characteristics the CVT system depends on. If you are servicing or rebuilding the continuously variable transmission on your EHHNK5 trowel, this is the correct upper module flyweight in the orange specification.

Key Features

• Genuine OEM CVT Specification: — Manufactured to the exact weight, geometry, and material grade of the original flyweight, ensuring proper centrifugal engagement force within the CVT system.
• Color-Coded Orange for Positive Identification: — The orange designation distinguishes this flyweight from other weight variants, allowing accurate assembly and preventing mismatched CVT tuning during service.
• Direct Replacement for EHHNK5 Ride-On Trowels: — Confirmed fitment for the EHHNK5 series, dropping into the upper CVT module with no modification to the housing or drive components.
• Restores Correct Belt Engagement and Drive Response: — A worn or damaged flyweight causes erratic blade speed, slipping drive, or loss of smooth RPM progression; replacing with part 40121 restores proper CVT response and consistent trowel performance.
• Backed by Multiquip OEM Quality: — As a genuine Multiquip part, the 40121 meets the same tolerancing and material standards as the component originally installed at the factory, supporting long service life in the CVT drive assembly.

The CVT upper module flyweight is a centrifugal component inside the continuously variable transmission that controls when and how firmly the drive belt engages as engine RPM rises. As the flyweights spin outward under centrifugal force, they push against the drive sheave to vary the effective pulley diameter, which in turn controls the speed and torque delivered to the trowel blades. When a flyweight becomes worn, cracked, or is the wrong weight specification for the application, the CVT cannot engage or modulate correctly — resulting in rough engagement, blade speed inconsistency, or premature belt wear.

For help confirming this part fits your machine, contact the DHS Equipment team with your model and serial number before ordering.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.