[Lifetime Warranty] 835-20-30 Racing CVT Drive Belt
835-20-30 racing CVT drive belt with BlueStars branding and 4-layer design packaging.
835-20-30 racing CVT drive belt with reinforced cogged design for smooth power transmission.
Collage of scooter, go-kart, motorcycle, and ATV showing compatibility for 835-20-30 racing CVT drive belt.
835-20-30 racing CVT drive belt showing four-layer material construction and close-up details of the belt teeth.
Gloved hand holding a black 835-20-30 racing CVT drive belt with a feature list overlay.
835-20-30 racing CVT drive belt with technical specifications for length, width, and teeth angle displayed.
Person driving a racing go-kart on a track, representing the performance of the 835-20-30 Racing CVT Drive Belt.
835-20-30 racing CVT drive belt with BlueStars branding and 4-layer design packaging.
835-20-30 racing CVT drive belt with reinforced cogged design for smooth power transmission.
Collage of scooter, go-kart, motorcycle, and ATV showing compatibility for 835-20-30 racing CVT drive belt.
835-20-30 racing CVT drive belt showing four-layer material construction and close-up details of the belt teeth.
Gloved hand holding a black 835-20-30 racing CVT drive belt with a feature list overlay.
835-20-30 racing CVT drive belt with technical specifications for length, width, and teeth angle displayed.
Person driving a racing go-kart on a track, representing the performance of the 835-20-30 Racing CVT Drive Belt.
Lifetime Warranty

[Lifetime Warranty] 835-20-30 Racing CVT Drive Belt

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835-20-30 Racing CVT Drive Belt

Key Features

  • Dimensions: 835mm Length x 20mm Top Width x 30° Angle
  • Construction: High-strength, reinforced composite material for durability
  • Performance: Engineered for high-mileage reliability and demanding applications
  • Resistance: Resistant to high heat and oil degradation

Replaces / Cross-Reference Part Numbers

  • 835 20 30
  • PL20705

Compatibility & Fitment

  • Engine Type: GY6 4-stroke long-case engines
  • Engine Models: 152QMI, 157QMJ
  • Displacement: 125cc, 150cc
  • Vehicle Types: Fits many models of scooters, mopeds, ATVs, and go-karts
  • Common Brands: Roketa, Taotao, Jonway, Vento, Verucci, and others using the GY6 150cc long-case engine

When to Replace

  • Visible damage such as cracks, fraying, glazing, or separation
  • Noticeable decrease in performance, including slipping or loss of top speed
  • Unusual noise or vibration from the CVT housing
  • As part of scheduled maintenance per your vehicle manufacturer's service interval

Installation Tips

  • Verify belt dimensions match your existing belt or manufacturer specifications before installation
  • Ensure pulley surfaces are clean and free from oil, grease, or debris
  • Install the belt according to the directional arrows, if present
  • Do not use tools to pry or force the belt onto the pulleys to avoid damage
  • Allow for a brief break-in period of moderate use for the belt to properly seat on the pulleys
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  • Perfect fit

    Perfect fit

    Continuously Variable Transmission CVT Drive Belt - Fit for 4 stroke 125cc 150cc GY6 157QMJ 152QMI 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 a few minutes 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.

FAQ

This belt is commonly used on many GY6 125cc and 150cc 4-stroke applications, especially long-case 152QMI and 157QMJ engines. It is often found on scooters, mopeds, ATVs, and go-karts that use a CVT transmission. Fitment can vary by transmission case and pulley setup, so the safest match is to confirm your current belt marking is 835-20-30 or verify your vehicle's required belt size before ordering.
No. Even within GY6 125cc and 150cc platforms, belt size can differ depending on whether the engine uses a long-case or another CVT configuration. This 835-20-30 size is commonly associated with long-case 152QMI and 157QMJ setups. If your old belt shows a different number, or if your transmission has been modified with different pulleys or variator parts, you should match the exact belt size rather than relying on engine displacement alone.
It is the belt size designation. In this format, 835-20-30 typically identifies the belt by its nominal dimensions used for CVT fitment matching. For replacement purposes, the most important step is to match the full marking exactly: 835-20-30.
Common symptoms include slipping during takeoff, reduced top speed, delayed acceleration, jerking, vibration from the CVT cover area, or a belt that has cracked, glazed, frayed, or narrowed from wear. In severe cases, the belt can snap and the vehicle will stop moving even though the engine still runs.
On most GY6 scooters and karts, belt replacement is a moderate job. Typical tools include basic metric sockets, a ratchet, and often an impact wrench or variator/clutch holding tool to remove the CVT hardware safely. If the CVT cover comes off easily and no seized fasteners are involved, the job often takes about 30 to 60 minutes.
Check the variator faces, clutch pulley faces, roller weights, clutch bell, and belt guides for grooves, heat damage, or uneven wear. Also clean out any belt dust inside the CVT cover. A new belt may wear quickly if the pulleys are damaged, the rollers are flat-spotted, or the clutch is sticking.
Premature belt wear is often caused by heat, worn variator rollers, misaligned or damaged pulley faces, aggressive riding under heavy load, or a clutch that does not engage smoothly. Oil or grease contamination inside the CVT can also shorten belt life. If a previous belt failed suddenly, inspect the entire CVT system before installing the replacement.