Skip to product information
SKU:
NLT1C01669
Ships for free in 2–4 business days.
3-Pack 725 Asymmetrical Drive Belts for 30 Series Torque Converters
$32.99
In Stock
$32.99
Sale price
$32.99
Regular price
This three-pack of 725 asymmetrical drive belts fits compatible 30-series go-kart and mini-bike torque-converter layouts.
Estimated delivery between
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Product Overview
A kart that slips on takeoff, jerks as the clutch engages, or leaves rubber dust inside the cover may have a glazed, stretched, or incorrectly aligned belt. Running the wrong asymmetrical profile can also destroy a new belt quickly.
These three replacement belts are marked for common 725 applications, including many 30-series converter kits. Some similar karts use a 669 belt instead. Match the old belt marking, top width, outside length, driver/driven alignment, and center distance rather than choosing by engine size alone.
Key Features & Performance
- Three belts provide a service replacement plus spares
- Asymmetrical profile for matching 30-series pulley faces
- 725 identification for compatible kart drive systems
- Suitable for many TrailMaster, Hammerhead, mini-bike, and custom converter layouts after measurement
Common Uses
- Replacing a belt that slips or squeals under acceleration
- Keeping spares for rental, race, or trail karts
- Correcting drive problems caused by a glazed or narrowed belt
Technical Specifications
- Product Type: Torque-converter drive belt set
- Belt Marking: 725
- Profile: Asymmetrical
- Quantity: 3
- Fitment: Compatible 30-series systems
- Condition: New aftermarket belts
Installation & Fitment
- Clean pulley faces without leaving oil or solvent residue
- Install the flat and angled belt sides in the correct orientation
- Check engine plate alignment and center distance before running
- Compare the old belt marking and measured dimensions; do not substitute for a 669 belt without confirming
Compatibility Notice
This is a universal or service-tool item, not a guaranteed bolt-on part for every vehicle or machine. Measure and compare all dimensions, connections, operating limits, and the intended system before purchase. Custom installation may be required.
Frequently Asked Questions
Q: How do I know whether my kart uses 725 or 669? A: Read the old belt marking and measure the converter center distance and belt dimensions.
Q: Why did my last belt fail quickly? A: Misalignment, wrong belt profile, seized pulleys, oil contamination, or incorrect spacing can overheat it.
Q: Are three belts included? A: Yes. This listing is for a three-belt set.
Q: Is this an original-equipment part? A: No. This is a new aftermarket product. Brand names and part numbers are used only to identify compatible applications.
Part Summary
keywords: 725 go kart drive belt, 30 series torque converter belt, 3 pack asymmetrical kart belts, TrailMaster 725 replacement belt, mini bike CVT drive belt
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, specifications, and application before purchase.