HONDA 17211-KR3-670 Cmx Airbox Intake Air Filter

( Manufacturer Part Number: 17211-KR3-670 ), ( Type: Airbox )

Review HONDA Cmx Oem Airbox Air Intake Filter fits REBEL ELEMENT 250 1985–1986

The **Honda 17211-KR3-670** is a high-performance air intake filter element specifically designed for the **1985-1986 Honda Rebel 250 (CMX250R)**, ensuring optimal airflow and peak engine efficiency for these iconic dual-sport motorcycles. Crafted from a durable, high-quality **cotton/paper blend media**, this aftermarket air filter is engineered to maintain a fine balance between filtration and airflow, allowing the Rebel s 250cc parallel-twin engine to breathe cleaner and more freely than the stock setup. The filter s **conical shape** and **precise fit** within the airbox ensure minimal restriction while effectively trapping dust, debris, and contaminants, protecting the engine s intake valves and cylinders from premature wear. Ideal for riders who demand both performance and longevity, this replacement filter is a straightforward upgrade that can be installed in minutes, requiring no modifications to the stock airbox. Whether you re cruising on twisty backroads, tackling off-road trails, or simply seeking a more responsive throttle response, the **Honda 17211-KR3-670** delivers a noticeable improvement in power delivery and engine smoothness, making it a must-have component for enthusiasts looking to revive their Rebel s stock performance. Built to meet Honda s exact specifications, this filter is a direct replacement that ensures compatibility without compromising on quality, offering a cost-effective solution for those who want to enhance their bike s breathing capacity while keeping maintenance simple.

### **Pros and Cons of Buying a Honda 17211-KR3-670 Airbox Air Intake Filter Element (1985-1986 Rebel 250 CMX)**

1. **Improved Airflow and Performance** Replacing the stock air filter with an aftermarket element can enhance airflow into the engine, leading to better throttle response, smoother acceleration, and increased horsepower. This is particularly noticeable in older motorcycles where the stock filter may be restrictive.

2. **Better Engine Breathing** The stock airbox on the 1985-1986 Rebel 250 is known to be somewhat restrictive. A high-quality aftermarket filter (like the one you mentioned) allows more air to reach the engine, which can improve combustion efficiency and overall power output.

3. **Easier Maintenance** Many aftermarket filters are washable and reusable, reducing long-term costs compared to disposable paper filters. This is especially useful if you ride frequently or in dusty conditions.

4. **Potential for Better Fuel Efficiency** With improved airflow, the engine may burn fuel more efficiently, though results vary depending on tuning and other modifications.

5. **Compatibility with Other Mods** If you plan to add a cold air intake or other performance upgrades, this filter can serve as a good starting point before further modifications.

6. **Easy Installation** The 17211-KR3-670 is designed to fit directly into the stock airbox, requiring minimal modification. Installation typically involves removing the old filter and securing the new one in place.

7. **Durability** High-quality aftermarket filters (such as those from K&N, Honda Performance Parts, or other reputable brands) are often more durable than stock filters, resisting clogging and maintaining performance over time.

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1. **Cost Compared to Stock** While the initial cost of an aftermarket filter is reasonable, it may be slightly more expensive than a basic OEM replacement. However, if it s reusable, the long-term cost can be lower.

2. **Potential for Increased Dust Ingestion** If you ride in dusty or off-road conditions, a high-flow filter may allow more debris into the engine, which could lead to increased wear on the cylinder walls, pistons, or intake valves over time. This risk can be mitigated by regular cleaning and maintenance.

3. **Voided Warranty (If Applicable)** If your bike is still under warranty, installing an aftermarket filter may void certain coverage, though this is rare for filters alone.

4. **Mixed Performance Gains** While some riders notice a significant improvement in throttle response, others may not see drastic changes, especially if the bike is already well-tuned or lacks other modifications (such as a carburetor upgrade).

5. **Possible Backfire Risk** If the filter is too aggressive or paired with a carburetor that isn t tuned for increased airflow, there s a slight risk of backfires, though this is uncommon with proper installation.

6. **Not a Standalone Power Increase** This filter alone won t make a major difference in power unless paired with other modifications (e.g., carburetor tuning, exhaust upgrades, or a performance camshaft).

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The **Honda 17211-KR3-670 airbox air intake filter element** is a solid choice for riders looking to improve airflow and engine breathing in their 1985-1986 Rebel 250. It offers noticeable benefits in throttle response and performance, especially when compared to the stock filter, while being relatively easy to install and maintain. The potential drawbacks such as increased dust ingestion or minor performance variability are outweighed by the advantages for most riders, particularly those who prioritize a smoother, more responsive ride.

If you re considering this upgrade, ensure you also check the filter s compatibility with your riding conditions (e.g., off-road vs. on-road) and consider pairing it with other performance mods if you re aiming for significant power gains.

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- You want a simple, effective way to improve airflow and throttle response.

- You ride in relatively clean conditions or are willing to maintain the filter properly.

- You re open to minor performance upgrades without major modifications.

- You re on a tight budget and the stock filter is still functioning adequately.

- You ride exclusively in extremely dusty or off-road conditions without proper maintenance.

- You expect dramatic power gains without additional tuning or modifications.

**Final Verdict:** This filter is a **worthwhile upgrade** for most 1985-1986 Honda Rebel 250 owners, offering a balance of cost, ease of installation, and performance benefits. If you re looking to enhance your bike s breathing without a full rebuild, this is a smart choice.

Details:

Removed From 1986 HONDA CMX250C REBEL MILES 17,531. 85-86 HONDA REBEL 250 CMX C OEM AIRBOX AIR INTAKE FILTER ELEMENT, This airbox is in very good condition and shows normal signs of wear. BIN # 40G, Please review all pictures to assess the condition of item. MILES# 17531 RUNNING MACHINE!frame# JH2MC1302GK108801engine #MC13E-5114665 model # This airbox is in very good condition and shows normal signs of wear.

part #: 17211kr3670 prices

• $60.00-$110.85

specifications intakefuelmotorcycle:

• for models: 250, Rebel, Element
• for makes: Honda
• for years: 1985-1986
• mpn: 17211-kr3-670
• type: Airbox

seller intakefuelmotorcycle:

• city: Spokane, Washington
• rating: 99.0%
• # reviews: 7070

general intakefuelmotorcycle:

• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery
• condition: Used

offer intakefuelmotorcycle:

• quantity: 1
• started: April 15, 2026
• options: Ship-to-home
• best offers: True
• availability: In Stock
• sold: 0

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

shipping intakefuelmotorcycle:

• cost: $0.00
• service: Standard
• class: Standard
• type: Fixed
• transit: 3-8 Days

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• credit card: Discover
• wallet: Apple-pay

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