[Lifetime Warranty] 842-20-30 Racing CVT Drive Belt
842-20-30 racing CVT drive belt with BlueStars packaging label.
Black 842-20-30 racing CVT drive belt with cogged design for scooter engine power transmission.
Collage of scooters, go-karts, motorcycles, and ATVs compatible with 842-20-30 racing CVT drive belt.
Infographic showing the 4-layer construction of the 842-20-30 Racing CVT Drive Belt with close-up texture details.
Gloved hand holding a black 842-20-30 racing CVT drive belt over a car engine.
842-20-30 Racing CVT drive belt showing length, width, and teeth angle specifications.
Person driving a racing go-kart on a track, representing the performance of the 842-20-30 Racing CVT Drive Belt.
842-20-30 racing CVT drive belt with BlueStars packaging label.
Black 842-20-30 racing CVT drive belt with cogged design for scooter engine power transmission.
Collage of scooters, go-karts, motorcycles, and ATVs compatible with 842-20-30 racing CVT drive belt.
Infographic showing the 4-layer construction of the 842-20-30 Racing CVT Drive Belt with close-up texture details.
Gloved hand holding a black 842-20-30 racing CVT drive belt over a car engine.
842-20-30 Racing CVT drive belt showing length, width, and teeth angle specifications.
Person driving a racing go-kart on a track, representing the performance of the 842-20-30 Racing CVT Drive Belt.
Lifetime Warranty

[Lifetime Warranty] 842-20-30 Racing CVT Drive Belt

Save 13%
0.00
$19.86
$22.84
$19.86
In stock
Fast delivery

Secure and trusted checkout with

  • Visa
  • Mastercard
  • American Express
  • PayPal
  • Diners Club
  • Discover
Contact for wholesale
🛠️
CONFIRM THE FIT FOR YOUR MODEL
Enter your model number

842-20-30 Racing CVT Drive Belt

Key Features

  • Dimensions: 842mm Length x 20mm Width x 30° Angle
  • Constructed with high-strength aramid fiber reinforcement for increased durability and performance
  • Engineered for high mileage and reliable operation
  • Resistant to high heat and oil degradation
  • Designed for motorized continuously variable transmission (CVT) applications

Replaces / Cross-Reference Part Numbers

  • 842-20-30
  • MGVK842Q

Compatibility & Fitment

  • Engine Type: Commonly used on 125cc and 150cc GY6 4-stroke long-case engines
  • Vehicle Types: Fits a wide range of scooters, ATVs, and go-karts
  • Common on models with 13-inch rear wheels
  • Known to fit select models including Vento Phantom R3 (150cc) and Vento Phantom R4i (150cc)
  • Note: Always verify the dimensions of your existing belt before ordering

When to Replace

  • Visible signs of wear such as cracking, fraying, glazing, or missing teeth
  • Experiencing belt slippage, loss of acceleration, or inconsistent engine RPM
  • As part of scheduled preventative maintenance according to your vehicle's service manual

Installation Tips

  • Ensure pulleys are clean and free of oil, glaze, and old belt residue before installation
  • Install the belt with any directional markings pointing in the direction of 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 use to seat the belt properly
Product image 1
Product image 2
  • Perfect fit

    Perfect fit

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

FAQ

This belt is designed for 125cc to 232cc GY6-based 4-stroke engines, including the 152QMI and 157QMJ long-case engines. It is compatible with a wide range of scooters, ATVs, go-karts, and mopeds from brands such as Roketa, Taotao, Vespa, Jonway, and Vento (specifically Phantom R3 and R4i models).
These numbers define the physical dimensions of the belt: 842mm is the effective length, 20mm is the top width, and 30° is the groove angle. It is critical to match these specifications to your existing belt to ensure proper engagement with the CVT pulleys.
You should inspect your belt if you notice a loss of top speed, difficulty accelerating from a stop, or a 'slipping' sensation when climbing hills. Visually, look for fraying, missing teeth, cracks along the inner cogs, or a significant reduction in width caused by wear. If the belt is noticeably thinner than 20mm, it is time for a replacement.
To replace the belt, you will typically need a socket set to remove the CVT cover, a variator locking tool or an impact wrench to remove the variator nut, and a clutch compression tool if you need to open the rear pulley to seat the belt properly. Expect the installation to take 30 to 60 minutes depending on your experience level.
When installing, ensure the belt is seated deep into the rear clutch pulley; you may need to squeeze the rear pulley halves apart to allow the belt to drop down, which provides the slack needed to slide it over the front variator boss. Always clean the pulley faces with a degreaser before installation to remove any old rubber residue or oil, as contaminants can cause premature slipping.