729-17.7-30 Racing CVT Drive Belt

729-17.7-30 Racing CVT Drive Belt

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$15.21
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$15.21
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729-17.7-30 Racing CVT Drive Belt

Key Features

  • Length: 729mm
  • Top Width: 17.7mm
  • Groove Angle: 30°
  • Construction: Reinforced, high-durability compound for racing applications.
  • Properties: Oil and heat-resistant for consistent performance.

Replaces / Cross-Reference Part Numbers

  • 729-17.7-30
  • 729 17.7 30

Compatibility & Fitment

  • Engine Type: GY6 4-stroke "long case" engines
  • Engine Codes: 139QMB, 1P39QMB
  • Displacement: 49cc, 50cc
  • Vehicle Types: Scooters, Mopeds, ATVs, and Go-Karts
  • Fitment Note: Typically used on models with 12-inch or 13-inch rear wheels.

When to Replace

  • Visible cracking, fraying, glazing, or excessive wear on the belt surface.
  • Slipping during acceleration or a noticeable loss of top speed.
  • Unusual noise or vibration from the CVT case.
  • As part of scheduled preventative maintenance per your vehicle's service manual.

Installation Tips

  • Ensure the drive and driven pulley faces are clean and free of oil, grease, or old belt residue before installation.
  • Install the belt with any directional markings pointing in the direction of forward rotation.
  • Do not use tools to pry or force the belt onto the pulleys, as this can damage the internal cords.
  • Allow for a brief break-in period of moderate, varied-speed riding.
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  • Perfect fit

    Perfect fit

    Continuously Variable Transmission CVT Drive Belt - Fit for 4 stroke GY6 49cc 50cc 139QMB 1P39QMB Long-case Engine Scooter, ATV, Go Kart, Moped.
  • Premium quality

    Premium quality

    Consists of 4 layers of top-grade materials: Top Fabric - EPDM Rubber - Aramid Fiber Cord with Adhesion Gum - Fiber-loaded Rubber.
  • Fixing symptoms

    Fixing symptoms

    Fix vehicle symptoms: cracked/ damaged belt, squealing noise, power steering/ AC not working, overheating engine, jerky acceleration, etc.
  • Simple installation

    Simple installation

    Put the belt onto the driving pulley first. Turn the pulleys slowly to let the belt slide in easily. Test running for 5 mins before use.
RUGGED BUILT FOR LONG-LASTING DURABILITY

RUGGED BUILT FOR LONG-LASTING DURABILITY

High-grade materials bring excellent degradation resistance to severe weather conditions, oil, and dust.
REDUCE VIBRATION AND NOISE

REDUCE VIBRATION AND NOISE

Allow smooth rotation with lower vibrations and noises by 45% for peak performance
EXCEPTIONAL PARTS, REMARKABLE JOURNEY

EXCEPTIONAL PARTS, REMARKABLE JOURNEY

Enjoy your seamless journey with the support of our replacement parts.