This CVT drive belt fits Yamaha ATVs. 

Belt description:

• CVT (-Continuous Variable Transmission-)
• Napa G-Force – 78G3640
• Yamaha UTVs and Side by Sides
• Replaces Carlisle – UA425
• Replaces Goodyear – 20GBS938
• Replaces Napa Gates 78G3640, 78C3640
• Replaces Yamaha – 3FA1764100, 3FA17641000
• Length: 946mm (37.25 in)
• Width: 20mm (0.781 in)
• High Performance Neoprene with Carbon Tensile Cords for Optimal Power Transmission and Increased Side Load Resistance

• Fits the following Yamaha models:

  • 1991 – 2004    Breeze  124cc
  • 2004 – 2009    Grizzly 125 
  • 2010 – 2013    Grizzly 125 Automatic

  • The fastest way to ruin your new powersport drive belt is to simply install it. If you don’t break the belt in properly, you’ll find yourself shredding the belt instead of the terrain. In fact, most powersport belt failures can be attributed to improper break-in and clutch adjustment – or not breaking in the belt at all.

    Ensure the best performance and longest life from your G-Force belt. Follow these three steps when installing a new belt.

    1. Install the Right Belt. Using a belt that’s even slightly different than the OE specs can affect performance – or stop yFou in your tracks.

    2. Align and Clean. Align the clutches according to manufacturer’s specifications and clean the sheaves with a Scotch-Brite® pad. Remove old belt residue, glazing, oils and debris with alcohol or acetone on the clutch sheave area. DO NOT USE BRAKE CLEANER.

    3. Install and Break It In. Perform two heat cycles in 20 miles. Conservatively run through the entire shift range, without exceeding ¾ throttle. Bring the belt back to normal operating temperature (15 minutes) then shut down and completely cool the belt for 30 minutes. Repeat the process.