Primary Sheave 018A-051000 by CFMOTO

Genuine CFMoto Primary Sheave — OEM Part #018A-051000

Your CVT turns engine power into ground speed, and it depends on precise parts working together. The genuine CFMoto Primary Sheave restores factory clutch performance on your UForce 500 or UForce 600, built to the weights, angles and tolerances CFMoto calibrated for smooth engagement and strong backshift.

The primary and secondary clutches, belt, covers and cooling ducts work as one system. Worn or mismatched parts cause belt slip, harsh engagement, overheating and early belt failure. This part is confirmed for 2 CFMoto models from 2008 to 2012. See the full fitment list below.

Primary Sheave at a Glance

• OEM part number: 018A-051000
• Brand: CFMOTO (genuine factory part)
• Part type: CVT Clutch
• Fits: UForce utility UTV models, 2008–2012
• Condition: New

CFMoto Models and Years This Primary Sheave Fits

Genuine CFMoto part #018A-051000 fits the models and years below. To be certain, match the part number to the factory parts diagram for your machine or contact us with your VIN before ordering.

CFMoto UForce utility UTV Fitment

Why Choose a Genuine CFMoto OEM Primary Sheave?

• Factory calibration for engagement, shift-out and backshift
• Correct belt alignment and deflection
• Keeps CVT cooling and sealing at factory standard
• Helps your drive belt last longer
• Sold by Witchdoctors, a CFMoto OEM parts source with factory part numbers and diagrams for every listing

Features and Materials

Key Features

• Genuine CFMoto OEM CVT part, part #018A-051000
• Built to CFMoto's original clutch specifications
• Precision-machined surfaces where applicable
• Designed for the listed CFMoto CVT systems
• Works with OEM belts, covers, seals and ducts

Materials and Construction

CFMoto CVT parts use precision-cast or machined aluminum sheaves and housings, hardened steel shafts and rollers, wear-resistant bushings, and heat-stable plastic or composite covers and ducts. Seals and gaskets keep water and dust out of the belt case.

Common Reasons Riders Replace This Part

• Fixing belt slip, jerky engagement or poor top speed
• Replacing worn sheaves, rollers, springs or bushings
• Repairing covers, seals and ducts after water intrusion
• Routine CVT service and belt replacement

Signs Your Primary Sheave Needs Replacing

• Belt slipping, squealing or burning smell
• Jerky, harsh or delayed engagement
• Loss of top speed or poor acceleration
• Glazed belt or frequent belt failures
• Water or debris inside the CVT cover

Installation Tips

1. Remove the CVT cover and clean out belt dust before taking anything apart.
2. Use the correct CFMoto clutch tools. Primary and secondary clutches are under spring tension.
3. Inspect sheave faces, rollers, bushings and the belt for wear while you are in there.
4. Assemble to the factory torque specs and check belt deflection and alignment.
5. Replace cover seals and gaskets, then follow the belt break-in procedure.

Not sure whether to tackle it yourself? Read when to seek professional help or DIY before you start.

Recommended Accessories and Maintenance Supplies

Pair your Primary Sheave with these parts and supplies:

• UTV drive belts — OEM and heavy-duty CVT belts
• UTV clutches — Clutch kits and components
• Clutch tools — Holders and pullers for CVT service
• Belt cases — Spare belt carriers for the trail
• CFMoto OEM parts diagrams — find every factory part for your model

Helpful Guides from the Witchdoctors Blog

• OEM vs Aftermarket UTV/ATV CVT Clutch Components
• ZForce Clutching 101 | Belts, Venting & Tuning Basics
• How to Inspect Your UTV/ATV Drive Belt for Wear & Damage
• CFMoto OEM vs. Aftermarket Parts: Which Is Better?

Frequently Asked Questions

What is the OEM part number for this CFMoto Primary Sheave?

The genuine CFMoto part number is 018A-051000. Use it to match this part to your factory parts diagram.

Which CFMoto models does part #018A-051000 fit?

It fits the UForce 500 (2008–2010); UForce 600 (2011–2012).

Is this a genuine CFMoto part?

Yes. This is a genuine CFMOTO OEM part, the same part number used by CFMoto at the factory, not an aftermarket copy.

Should I replace the belt at the same time?

If the belt is glazed, cracked or worn to the minimum width, replace it with the clutch parts so you start fresh.

What causes CVT belts to burn up?

The usual causes are riding in high range at low speed, heavy loads, water in the CVT and worn clutch parts. Use low range for slow, heavy work.

Do I need special tools?

Yes. Most CFMoto clutches need a clutch holder and puller to disassemble safely. Using the wrong tools can damage parts.

Order Your Genuine CFMoto Primary Sheave Today

Get your UForce 500 or UForce 600 back to factory condition. Add the genuine CFMoto Primary Sheave (part #018A-051000) to your cart today, and order the related parts above at the same time so you can finish the job in one go.

• How long will it take to receive my order?
• Shipping and return policy
• Questions about fitment? Contact us
• Shop all CFMoto OEM parts

Where to Ride Your CFMoto

Ready to put your machine to work? These off-road parks welcome both ATVs and UTVs. Check each park's current rules, vehicle-width limits and permit requirements before you go.

• Barnwell Mountain Recreation Area — Gilmer, Texas: about 50 miles of trails
• Ride Royal Blue — Pioneer, Tennessee: a base camp for the 900+ mile North Cumberland trail network