After researching manufacturer specifications, industry standards, and aggregated owner feedback from multiple forums, we compared the top open primary belt drives available. Our evaluation focuses on construction quality, material strength, ease of installation, and real-world reliability. Whether you are building a custom chopper or upgrading a stock bike, this guide will help you choose the right belt for your needs.
| Photo | Product | Score | Buy |
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BDL 3 Inch Open Primary Belt Drive Kit Best Overall 3 inch width, 1-1/8 inch pitch, Kevlar reinforced |
9.1 | 🛒 Check Price |
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Prism Supply Co. 2 Inch Open Primary Belt Best Value 2 inch width, 1.125 inch pitch, urethane construction |
8.7 | 🛒 Check Price |
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Paughco 2.5 Inch Open Primary Belt Best for Custom Choppers 2.5 inch width, 1.125 inch pitch, black urethane |
8.4 | 🛒 Check Price |
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Kutter Performance 3 Inch Open Primary Belt High Performance 3 inch width, 1.125 inch pitch, Kevlar reinforced |
8.1 | 🛒 Check Price |
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Hawg Halters 2 Inch Open Primary Belt Entry Level 2 inch width, 1.125 inch pitch, urethane |
7.8 | 🛒 Check Price |
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Ultima 2.5 Inch Open Primary Belt Solid Mid-Range 2.5 inch width, 1.125 inch pitch, urethane with fiber reinforcement |
7.5 | 🛒 Check Price |
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V-Twin Manufacturing 2 Inch Open Primary Belt Basic Utility 2 inch width, 1.125 inch pitch, standard urethane |
7.2 | 🛒 Check Price |
1. BDL 3 Inch Open Primary Belt Drive Kit: Best Overall
The BDL 3 Inch Open Primary Belt Drive Kit is a top choice for custom builders seeking reliability and performance. Its Kevlar reinforcement resists stretching and heat, making it suitable for high-torque engines. Owner feedback consistently praises its longevity and smooth power delivery, even under hard acceleration. The kit includes a matched pulley set, which simplifies installation and ensures proper alignment out of the box.
However, this belt is not the most affordable option. Riders on a tight budget may find better value in narrower or non-Kevlar belts. Additionally, the 3 inch width requires compatible pulleys and may not fit all stock primary covers. If you are building a show bike or a daily rider that demands maximum durability, this is an excellent investment. But for a simple commuter, a less expensive alternative could suffice.
- Kevlar reinforced construction for high tensile strength and heat resistance
- 3 inch width provides excellent power transfer and alignment stability
- Includes matched pulley set for precise fitment
Pros: Superior durability and long service life; Smooth, quiet operation with minimal vibration
Cons: Premium price point may not suit budget builds
2. Prism Supply Co. 2 Inch Open Primary Belt: Best Value
The Prism Supply Co. 2 Inch Open Primary Belt strikes a solid balance between cost and capability. Its urethane construction provides adequate strength for most street and custom applications, and owner reports indicate it holds up well under normal riding conditions. The narrower 2 inch width makes it compatible with many aftermarket pulleys and simplifies alignment. For the price, it delivers dependable performance without breaking the bank.
That said, this belt may not be ideal for high-horsepower or racing builds where heat and stress are extreme. The urethane can degrade faster than Kevlar under sustained high loads. If you are building a mild cruiser or a bobber, this is an excellent choice. But riders pushing big power or riding in very hot climates should consider a more robust option.
- Urethane material offers good flexibility and resistance to abrasion
- 2 inch width reduces weight and fits many stock primary setups
- Cost-effective without sacrificing essential performance
Pros: Affordable price for a quality open belt; Easy to install with standard hand tools
Cons: Not as heat resistant as Kevlar belts in extreme conditions
3. Paughco 2.5 Inch Open Primary Belt: Best for Custom Choppers
The Paughco 2.5 Inch Open Primary Belt is a popular choice among custom chopper enthusiasts. Its black finish and classic look blend seamlessly with traditional builds. The aramid reinforcement adds strength without making the belt overly stiff. In our research, owners appreciated the straightforward installation process and the belt’s ability to maintain tension over time. It works well with most standard aftermarket pulleys.
However, a few users noted that alignment can be finicky when paired with pulleys from other brands. This may require shimming or adjustment. If you are building a show bike that prioritizes style and you are willing to spend time on fine-tuning, this belt is a solid pick. But if you want a hassle-free fit with any pulley, consider a kit that includes matched components.
- Classic black finish complements vintage and chopper aesthetics
- 2.5 inch width offers a good compromise between strength and fitment
- Reinforced with aramid fibers for added durability
Pros: Aesthetic design fits custom builds well; Reasonable price for the quality
Cons: Some users report minor alignment issues with non-Paughco pulleys
4. Kutter Performance 3 Inch Open Primary Belt: High Performance
The Kutter Performance 3 Inch Open Primary Belt is engineered for riders who demand maximum power transfer. Its Kevlar construction handles high torque without stretching, and the wide 3 inch profile reduces the risk of belt slip. Owner feedback from performance forums highlights its effectiveness in drag racing and high-output street bikes. The belt maintains its shape well even after repeated hard launches.
On the downside, this belt is on the expensive side and may not fit all primary covers without modification. It also requires precise alignment to avoid premature wear. If you are building a high-performance machine and are willing to invest in proper setup, this belt delivers. But for a stock or mild build, the extra cost and complexity may not be justified.
- Kevlar reinforcement for high torque applications
- 3 inch width maximizes power transfer efficiency
- Designed for performance-oriented builds
Pros: Excellent grip and minimal slippage under load; Good for high-horsepower engines
Cons: Higher cost and limited compatibility with some pulleys
5. Hawg Halters 2 Inch Open Primary Belt: Entry Level
The Hawg Halters 2 Inch Open Primary Belt is an entry-level option that gets the job done without costing a lot. Its urethane material is flexible and easy to install, making it a good choice for first-time builders or budget-conscious riders. Owner reviews indicate it works well for stock or mildly modified engines, providing reliable operation for daily riding. The narrow 2 inch width also makes it compatible with many stock pulley setups.
However, this belt is not built for high-stress environments. It can stretch or wear faster under heavy torque or extreme heat. If you are building a show bike that sees occasional light use, this belt offers good value. But for a high-mileage daily rider or a performance build, you will likely need to upgrade sooner rather than later.
- Budget-friendly option for basic builds
- Lightweight urethane construction reduces rotating mass
- Simple installation with no special tools required
Pros: Very affordable price point; Good for low to moderate power applications
Cons: Less durable than Kevlar or aramid belts
6. Ultima 2.5 Inch Open Primary Belt: Solid Mid-Range
The Ultima 2.5 Inch Open Primary Belt sits in the middle of the pack, offering a step up from entry-level urethane belts with its fiber reinforcement. It provides decent strength and resistance to stretching, making it suitable for moderate performance builds. Owner feedback suggests it works well in cruiser and custom applications where the engine is not pushed to the limit. The 2.5 inch width is a versatile size that fits many pulley sets.
That said, this belt still falls short of Kevlar options in high-torque or high-heat scenarios. Some users reported that it began to show wear after extended hard riding. If you are on a moderate budget and your bike is not a high-horsepower monster, this belt is a reasonable choice. But serious builders may want to invest in a more robust belt from the start.
- Fiber-reinforced urethane for improved strength over plain urethane
- 2.5 inch width fits many aftermarket pulleys
- Reasonable price for a mid-range belt
Pros: Better durability than basic urethane belts; Good fit and finish
Cons: Not as strong as Kevlar belts for extreme use
7. V-Twin Manufacturing 2 Inch Open Primary Belt: Basic Utility
The V-Twin Manufacturing 2 Inch Open Primary Belt is the most basic belt in our lineup. It is made from standard urethane without any reinforcement, which keeps the cost low but also limits its lifespan and performance. In our research, owners used it primarily for short-term builds or as a temporary replacement. It works for low-power engines and occasional riding, but it will not hold up to sustained abuse.
This belt is best suited for riders who need a quick, cheap solution and are not concerned about long-term reliability. It is not recommended for high-performance or daily driver applications. If your build is a low-budget project that sees minimal use, this belt might work. Otherwise, we recommend spending a little more for a belt that will last.
- Basic urethane construction for light-duty use
- 2 inch width for simple fitment
- Lowest cost option in this comparison
Pros: Very inexpensive; Easy to replace if needed
Cons: Limited durability and heat resistance
Frequently Asked Questions
What is an open primary belt drive?
An open primary belt drive replaces the traditional chain or enclosed belt system in a motorcycle’s primary drive. It uses a toothed belt that runs externally between the engine and transmission sprockets, often left exposed for aesthetic reasons. Open belts are popular in custom and chopper builds for their clean look and reduced maintenance compared to chains.
How do I choose the right width for my open primary belt?
The width you need depends on your engine’s power output and the pulley set you have. Wider belts (2.5 to 3 inches) handle more torque and reduce the risk of slipping, but require compatible pulleys and may not fit all primary covers. Narrower belts (2 inches) are lighter and fit more stock setups, but may not be sufficient for high-horsepower engines. Always match the belt width to your pulley set.
Can I install an open primary belt myself?
Yes, installation is generally straightforward if you have basic mechanical skills. You will need to remove the old primary drive, align the new pulleys, and tension the belt according to the manufacturer’s specifications. Most belts come with instructions. However, alignment is critical to prevent premature wear, so take your time to ensure everything is straight.
How often should I replace an open primary belt?
The lifespan varies based on material, riding conditions, and maintenance. Kevlar-reinforced belts can last many years under normal use, while basic urethane belts may need replacement sooner. Inspect your belt regularly for cracks, fraying, or glazing. Replace it if you notice any damage or if the belt starts to slip despite proper tension.
Are open primary belts safe for street use?
Yes, when properly installed and maintained, open primary belts are safe for street riding. They are less likely to snap suddenly compared to chains. However, because they are exposed, they can be damaged by debris or if something gets caught in the belt. Regular inspection and proper guarding (if required by local laws) are recommended.
Our Verdict
After comparing specifications, durability, and owner feedback, the BDL 3 Inch Open Primary Belt Drive Kit is our top pick for its Kevlar construction, excellent power transfer, and long-term reliability. For riders seeking a balance of quality and affordability, the Prism Supply Co. 2 Inch Open Primary Belt offers great value without major compromises. Choose based on your power needs and budget.
Last reviewed and spec-checked: March 3, 2026. We re-check our picks and listings periodically.
