Adding a nitrous oxide system to a motorcycle can deliver a significant horsepower boost, but choosing the right kit requires careful research. We compared manufacturer specifications, industry safety standards, and aggregated owner feedback to evaluate the top options. Our guide covers dry and wet systems, single and multi-port setups, and kits suited for various bike types. Whether you are looking for a simple dry shot or a fully adjustable wet system, this researched comparison will help you make an informed decision. Note that installation and tuning expertise are critical for safe operation.
| Photo | Product | Score | Buy |
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Dynotune Nitrous Oxide System Motorcycle Dry Kit Best Dry Kit for Beginners Single nozzle dry system, 40-60 HP shot, includes bottle heater and pressure gauge |
9.0 | 🛒 Check Price |
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ZEX Nitrous Oxide System Motorcycle Wet Kit Best Wet Kit for Power Addicts Wet single nozzle kit, 50-150 HP adjustable, includes fuel solenoid and jetting |
8.7 | 🛒 Check Price |
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NOS Sportsman Nitrous Kit for Motorcycles Trusted Brand for Reliability Wet kit with two nozzles, 75-125 HP, includes all solenoids and brackets |
8.4 | 🛒 Check Price |
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BikeBerry Nitrous Oxide Kit for Motorcycles Best Budget Entry Dry single nozzle kit, 25-50 HP, includes bottle and basic hardware |
7.8 | 🛒 Check Price |
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Dynotune Progressive Nitrous Controller for Motorcycles Best Accessory for Smooth Delivery Programmable progressive controller, works with most NOS kits, RPM and throttle based |
8.1 | 🛒 Check Price |
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ZEX Blackout Nitrous Kit for Motorcycles Stealth Design with Performance Wet kit with black anodized components, 50-100 HP, includes purge kit |
7.3 | 🛒 Check Price |
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Boom! Nitrous Oxide System for Motorcycles Compact Design for Tight Spaces Mini wet kit, 20-40 HP, small bottle and compact solenoids |
7.5 | 🛒 Check Price |
1. Dynotune Nitrous Oxide System Motorcycle Dry Kit: Best Dry Kit for Beginners
In our evaluation, the Dynotune Dry Kit stands out as the most user-friendly entry-level NOS system for motorcycles. Owner feedback consistently praises the clear instructions and the included bottle heater, which helps maintain stable pressure. Based on the spec sheet, the single nozzle setup delivers a clean 40-60 HP increase on most fuel-injected bikes without requiring fuel system modifications. The adjustable jetting allows riders to fine-tune the shot size for their engine.
However, this is a dry system, meaning it does not add extra fuel; it relies on the stock fuel injectors to compensate. This can be a limitation for high-horsepower builds or older carbureted motorcycles. Riders with heavily modified engines or those seeking more than a 60 HP shot should consider a wet system. Also, safety relies on proper tuning to avoid lean conditions.
- Simple dry injection ideal for fuel-injected bikes
- Includes adjustable jetting for precise tuning
- Bottle heater maintains consistent pressure
Pros: Straightforward installation with clear instructions; Reliable pressure regulation for consistent delivery
Cons: Dry system may not suit carbureted motorcycles
2. ZEX Nitrous Oxide System Motorcycle Wet Kit: Best Wet Kit for Power Addicts
For riders seeking maximum horsepower, the ZEX Wet Kit is a top contender. Based on manufacturer specifications and owner feedback, this system can deliver up to 150 HP on properly built engines. The wet setup injects both nitrous and additional fuel through a single nozzle, which significantly lowers the risk of leaning out the mixture. The progressive controller (sold separately) allows for a gradual power hit, improving traction and control.
On the downside, installation is more involved than a dry kit, as you need to tap into the fuel system. Some owners reported that the supplied jets require fine-tuning for specific bikes. This kit is best suited for experienced tuners or riders with built engines. Beginners may find the complexity overwhelming. Additionally, the price point is higher, reflecting the advanced components.
- Delivers extra fuel with nitrous for safe high-power shots
- Adjustable from 50 to 150 HP with included jets
- Features a progressive controller option for smooth delivery
Pros: High power potential for serious performance builds; Wet system reduces lean-out risk
Cons: More complex installation requires fuel system tapping
3. NOS Sportsman Nitrous Kit for Motorcycles: Trusted Brand for Reliability
NOS is a household name in nitrous, and their Sportsman Kit lives up to expectations. In our research, this wet kit is built with robust solenoids and a dual-nozzle plate that promotes even cylinder distribution. Owner feedback highlights consistent performance and durability over multiple uses. The kit is designed for a 75-125 HP range, making it suitable for street and strip motorcycles.
However, the physical footprint of the solenoids and brackets can be challenging to mount on cramped sportbikes. Some riders had to fabricate custom mounting solutions. Also, the jetting is optimized for V8 engines, so motorcycle owners may need to purchase additional jets for fine-tuning. This kit is best for riders who prioritize brand trust and are willing to invest in custom fitment.
- Dual nozzle design for even distribution
- High-quality solenoids from a reputable brand
- Comprehensive installation hardware included
Pros: Proven reliability from the NOS brand; Smooth power delivery with dual nozzles
Cons: Bulky hardware may be difficult to fit on some bikes
4. BikeBerry Nitrous Oxide Kit for Motorcycles: Best Budget Entry
The BikeBerry Nitrous Kit is the most budget-friendly option we evaluated. It is a dry system designed for small-displacement motorcycles, offering a modest 25-50 HP boost. Owner feedback indicates that it works well on 250cc-600cc bikes for occasional use. The kit comes complete with a bottle, lines, and a simple push-button activation.
However, the components feel less durable than premium kits, and there is no way to adjust the jetting. The safety margin is narrower because it lacks a fuel enrichment feature. This kit should only be considered by riders who understand the risks of dry nitrous on a motorcycle. It is not recommended for high-performance or track use. Skip this if you plan to use nitrous frequently or on a larger engine.
- Affordable option for first-time NOS users
- Simple dry design with pre-set jetting
- Includes a 2.5 lb bottle and mounting brackets
Pros: Very low price point for entry-level; Easy to install with basic tools
Cons: Limited power output and no adjustability
5. Dynotune Progressive Nitrous Controller for Motorcycles: Best Accessory for Smooth Delivery
While not a standalone NOS kit, the Dynotune Progressive Controller is a valuable addition for riders who want to manage power delivery. Based on owner feedback, this device can significantly improve traction by ramping in nitrous over a set RPM range or time. It works with most single-stage solenoids and includes programmable settings for throttle position and RPM.
However, installation is more complex than a standard kit, and some users reported difficulty with the programming interface. It is best suited for riders who are comfortable with electronics and want to maximize safety. If you are a casual user, the added complexity may not be worth the benefit. This controller is a great match for the Dynotune or ZEX kits above.
- Allows gradual nitrous delivery for better traction
- Programmable via RPM and throttle position
- Compatible with most single-stage kits
Pros: Enhances safety by reducing wheel spin; Customizable curves for different tracks
Cons: Requires additional wiring and setup
6. ZEX Blackout Nitrous Kit for Motorcycles: Stealth Design with Performance
The ZEX Blackout Kit is essentially a cosmetic variant of the standard ZEX wet kit, with black anodized components and a purge valve. Performance-wise, it delivers the same 50-100 HP range as other ZEX offerings. Owner feedback indicates that the purge valve works well and adds a visual effect, but it is not a necessity.
However, the price premium for the black finish may not justify the cost for most riders. Some users reported that the black coating can wear off over time. Additionally, the purge valve introduces another potential leak point. This kit is best for riders who want a coordinated look and are willing to pay extra. For pure performance, the standard ZEX kit offers better value.
- Black anodized solenoids and brackets for stealth look
- Includes a purge valve for quick system activation
- Adjustable jetting for 50-100 HP range
Pros: Aesthetic appeal with blacked-out components; Purge valve included for showy starts
Cons: Higher price for cosmetic features
7. Boom! Nitrous Oxide System for Motorcycles: Compact Design for Tight Spaces
The Boom! Nitrous System is designed for motorcycles where space is at a premium. It uses a compact 1.5 lb bottle and mini solenoids that can be tucked away under the seat or side panels. Owner feedback on forums indicates that it is easy to install and works well for small-displacement bikes or as a secondary system. The pre-set 20-40 HP shot is conservative but safe.
However, the small bottle offers limited run time, and the fixed jetting cannot be adjusted. The components feel less robust than full-size kits, and there are fewer safety features. This kit is suitable for occasional use on commuter bikes or for riders who want a hidden setup. It is not recommended for high-performance applications or frequent use. Skip this if you need more than 40 HP or plan to race.
- Small footprint fits under seat or fairing
- Pre-set jetting for 20-40 HP boost
- Includes mini 1.5 lb bottle
Pros: Ideal for bikes with limited space; Lightweight and easy to hide
Cons: Limited power and short run time
Frequently Asked Questions
What is the difference between a dry and wet nitrous kit for motorcycles?
A dry kit injects only nitrous oxide into the intake, relying on the stock fuel system to add extra fuel. This is simpler but can cause lean conditions if the fuel system cannot compensate. A wet kit injects both nitrous and additional fuel through a nozzle, reducing the risk of leaning out. Wet kits are generally safer for higher horsepower shots but are more complex to install.
How much horsepower can I expect from a motorcycle nitrous kit?
Horsepower gains vary by kit and engine. Entry-level dry kits typically add 25-60 HP, while wet kits can add 50-150 HP or more on built engines. Actual gains depend on engine size, compression, and tuning. It is important to stay within the safe limits of your motorcycle’s components.
Do I need to upgrade my fuel system when adding nitrous?
For a dry kit, a fuel pump upgrade may be necessary if the stock pump cannot maintain pressure under high demand. For a wet kit, the additional fuel is supplied directly, so stock fuel systems often suffice for moderate shots. However, for high horsepower levels, upgrading the fuel pump and injectors is recommended.
Is nitrous safe for motorcycle engines?
When properly installed and tuned, nitrous is generally safe. Risks include detonation, lean conditions, and excessive cylinder pressure. Using a wet kit, a progressive controller, and a wideband air-fuel ratio gauge can mitigate these risks. Always follow the manufacturer’s guidelines and consider professional tuning.
Can I install a nitrous kit myself?
Installation difficulty varies. Dry kits are often DIY-friendly with basic mechanical skills. Wet kits require tapping into the fuel system and more electrical work, which may be challenging for beginners. If you are not confident, professional installation is recommended to ensure safety and performance.
Our Verdict
After researching and comparing specifications, safety standards, and owner feedback, the Dynotune Dry Kit earns our top pick for its balance of ease of use, reliability, and value. It is an excellent starting point for riders new to nitrous. For those seeking maximum power and safety, the ZEX Wet Kit is the runner-up, offering high horsepower potential with a wet system. Choose based on your experience level and performance goals.
