UNI NU-4131ST Air Filter 804451041311 CRF50/XR50/CRF70/XR70

( Brand: Uni ), ( Part Type: Filter ), ( UPC: 804451041311 ), ( Length: 4.05 ), ( Width: 3.55 ), ( Height: 1.05 ), ( Weight: 0.03 ), ( Country/region Of Manufacture: Usa ), ( Placement On Vehicle: Middle ), ( Material: Foam ), ( Units: Each ), ( Ride Type: Mc/atv/utv ), ( Installation: Simple ), ( Seal Type: Rubber Or Foam ), ( Retail Package: Yes ), ( Pre Oiled: No )

Review UNI Honda Crf50/xr50/crf70/xr70 Air Filter Made In Usa fits CRF50 XR50 CRF70 XR70

Introducing the UNI Filter Nu-4131ST, a premium air filter designed specifically for Honda CRF50, XR50, CRF70, and XR70 models. This filter is engineered to deliver exceptional engine protection and optimal performance, ensuring your mini bike runs smoothly and efficiently.

The Nu-4131ST is constructed using advanced pleated cotton media, which boasts a large surface area for maximum contaminant capture. The filter's unique design and size offer an excellent seal within the airbox, preventing unwanted dirt and debris from entering the engine.

One of the standout features of this air filter is its washable and reusable design. You can easily clean the filter with mild soap and water or compressed air. After cleaning, simply let it dry thoroughly before reinstalling it in your Honda mini bike. This not only saves you money in the long run but also reduces the environmental impact of disposable filters.

The Nu-4131ST comes with an oiled surface to ensure proper sealing and filtration right out of the box. The oil coating also provides an additional layer of protection against engine damage caused by dust and other particles.

This air filter is designed to provide a perfect fit for Honda CRF50, XR50, CRF70, and XR70 models. The filter's shape and dimensions are specifically tailored to match the airbox of these mini bikes, ensuring a secure and effective seal.

In conclusion, the UNI Filter Nu-4131ST is an excellent choice for riders looking to enhance their Honda CRF50, XR50, CRF70, or XR70's performance and durability. With its advanced design, washable and reusable properties, and perfect fit, this air filter is a must-have accessory for any mini bike enthusiast.

Buying a new air filter for your Honda CRF50/XR50/CRF70/XR70, such as the Nu-4131ST UNI 804451041311, can have several pros and cons to consider.

1. Improved Engine Performance: A new air filter ensures that the engine receives clean air, which can lead to improved engine performance. This means better throttle response, increased power, and smoother operation.

2. Longer Engine Life: By keeping the engine free of dirt and debris, a new air filter can help extend the life of the engine. This can save you money in the long run by reducing the need for costly engine repairs.

3. Better Fuel Economy: A clean air filter allows the engine to burn fuel more efficiently. This can lead to better fuel economy and savings on fuel costs.

4. Reduced Emissions: A clean air filter can help reduce engine emissions, making your bike more eco-friendly and potentially reducing your carbon footprint.

1. Cost: A new air filter can be an additional expense, especially if you need to replace it frequently. The cost of the filter itself, as well as the labor costs if you choose to have it installed by a professional, can add up over time.

2. Frequency of Replacement: Air filters need to be replaced regularly to ensure optimal engine performance and longevity. Depending on your riding conditions, you may need to replace your air filter more frequently than you would like.

3. Time and Convenience: Replacing an air filter can be a time-consuming process, especially if you choose to do it yourself. You will need to purchase the filter, remove the old one, install the new one, and then dispose of the old one.

The decision to buy a new air filter for your Honda CRF50/XR50/CRF70/XR70, such as the Nu-4131ST UNI 804451041311, ultimately comes down to weighing the pros and cons. While there are costs associated with purchasing and installing a new air filter, the benefits of improved engine performance, longer engine life, better fuel economy, and reduced emissions can outweigh the costs in the long run.

If you are a regular rider and want to ensure optimal engine performance and longevity, it is recommended to replace your air filter regularly. You can choose to purchase the filter yourself and install it yourself, or have it installed by a professional. Regardless of your choice, the investment in a new air filter can save you money in the long run by reducing the need for costly engine repairs and improving fuel economy.

Details:

Re-usable, easy maintenance. The best selling replacement air filter for competition motorcycles. Uni Dirt Bike Air Filters are unsurpassed in airflow, dirt stopping and overall performance. Unique two stage design allows for easy and complete cleaning.

Fits: 2004 2015 Honda CRF50, CRF70, 1997 2003 XR50R, XR70R, Fits stock air box only. Thin Ultra Seal base is virtually impossible to tear. Designed to fit in the factory air box exactly like original filter. Used by Factory Yamaha, Kawasaki and Suzuki.

part #: 804451041311 prices

• $9.59-$17.99

specifications scoofilters:

• for models: Crf50, Xr50, Crf70, Xr70
• for makes: Honda
• brand: Uni
• part type: Filter
• upc: 804451041311
• length: 4.05
• width: 3.55
• height: 1.05
• weight: 0.03
• country/region of manufacture: Usa
• placement on vehicle: Middle
• material: Foam
• units: Each
• ride type: Mc/atv/utv
• installation: Simple
• seal type: Rubber Or Foam
• retail package: Yes
• pre oiled: No

payments scoofilters:

• wallet: Google-pay
• credit card: Mastercard
• other

returns scoofilters:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

seller scoofilters:

• # reviews: 7508
• rating: 100.0%
• city: Minford, Ohio

offer scoofilters:

• sold: 0
• quantity: 4
• options: Ship-to-home
• availability: In Stock
• started: October 1, 2025

general scoofilters:

• condition: New
• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Air Filters

shipping scoofilters:

• class: Standard, Expedited
• type: Fixed
• cost: $0.00
• transit: 5-10 Days
• service: USPS First Class, USPS Priority Mail Padded Flat Rate Envelope, USPS Priority Mail Express
• carrier: USPS

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