HONDA 45150-KZ4-J21 Front Brake Caliper 309

( Manufacturer Part Number: 45150-KZ4-J21 ), ( Part Type: Brake Caliper ), ( Non-domestic Product: No ), ( Machine Type: Dirt Bike, Off-road Motorcycle ), ( Color: Silver ), ( Compatible Model: Cr250, Cr250r, Cr125, Cr125r ), ( Material: Aluminum ), ( Placement On Vehicle: Front ), ( Unit Type: Unit ), ( Compatible Year: 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994 ), ( Country Of Origin: Japan )

Review HONDA Oem Rebuilt Front Brake Caliper 309 fits CR250R 2000

The **Honda 45150-KZ4-J21 2000 CR250R Front Brake Caliper (309)** is a precision-engineered, high-performance braking component designed exclusively for Honda s iconic 2000 model year CR250R, a legendary off-road motorcycle renowned for its agility, durability, and competitive edge in motocross and trail riding. This front brake caliper is a critical part of the bike s braking system, engineered to deliver consistent, powerful stopping power while maintaining reliability under the demanding conditions of off-road use. Crafted from high-grade materials, the caliper features a robust, powder-coated aluminum housing that resists corrosion and wear, ensuring longevity even in harsh environments where dirt, mud, and moisture are constant challenges. The internal design incorporates dual-piston technology, allowing for balanced hydraulic pressure distribution across the brake pads, which maximizes friction and heat dissipation for superior braking performance without fade. The caliper s precise machining and tight tolerances ensure smooth operation, reducing the risk of binding or uneven pad wear, while the integrated mounting bracket is engineered to align perfectly with the CR250R s front fork, providing a secure and vibration-free attachment. Whether tackling technical trails, competing in motocross events, or simply enjoying the thrill of off-road riding, this caliper delivers the confidence-inspiring stopping power riders demand. As a genuine Honda replacement part, it adheres to the manufacturer s exact specifications, ensuring compatibility and performance equivalent to the original equipment, making it an essential upgrade or replacement for any CR250R owner seeking to maintain peak mechanical condition.

### **Pros and Cons of buying a Honda 45150-KZ4-J21 (2000 CR250R Front Brake Caliper 309)**

1. **OEM Quality and Fitment** This is a genuine Honda replacement part, ensuring an exact fit for the 2000 CR250R. OEM parts are designed to match the original specifications, reducing the risk of compatibility issues.

2. **Reliability** Honda s braking systems are known for durability, and this caliper is built to last with proper maintenance. It should provide consistent braking performance if installed correctly.

3. **Ease of Installation** Being an original part, it should integrate seamlessly with the bike s existing brake system, requiring minimal modification. Many aftermarket parts may require additional adjustments or upgrades.

4. **Availability of Support** Since it s an OEM component, you can easily find installation guides, diagrams, and technical support from Honda dealerships or authorized service centers.

5. **Long-Term Cost Savings** While the upfront cost may be higher than some aftermarket alternatives, an OEM caliper can reduce long-term expenses by avoiding premature wear or failure from inferior materials.

6. **Resale Value** If you ever decide to sell or trade in your bike, having OEM parts can make it more appealing to buyers who prefer stock or easily replaceable components.

7. **Compatibility with Stock Components** Since it matches the original design, it will work seamlessly with the bike s stock brake pads, rotors, and master cylinder, avoiding potential mismatches that could affect braking performance.

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1. **Higher Cost** OEM parts are typically more expensive than aftermarket alternatives. The price may be a significant factor if you're working with a tight budget.

2. **Limited Customization** Unlike aftermarket calipers, which may offer performance upgrades (e.g., larger pistons, improved cooling), this is a stock replacement with no enhancements.

3. **Potential for Wear** If the original caliper was already worn or damaged, replacing it with an identical OEM part won t address underlying issues like seized pistons, corroded internals, or warped rotors. You may need to replace other components (e.g., brake pads, rotors) for optimal performance.

4. **Longer Lead Times** OEM parts, especially for older models like the 2000 CR250R, can sometimes have longer wait times compared to aftermarket options, which are often stocked by multiple suppliers.

5. **No Performance Upgrades** If you're looking to improve braking performance (e.g., for track use or aggressive riding), this caliper won t provide any advantages over the original. Aftermarket options may offer better cooling, stiffer construction, or improved pad clearance.

6. **Potential for Counterfeit Parts** When purchasing OEM parts online, there s a risk of receiving counterfeit or refurbished parts that don t meet Honda s standards. Buying from authorized dealers or reputable sellers can mitigate this risk but may increase costs.

7. **Maintenance Requirements** Like any brake caliper, this will require regular cleaning, bleeding (if the hydraulic system is involved), and pad replacement. Neglecting maintenance can lead to reduced braking efficiency or failure.

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The **Honda 45150-KZ4-J21 (2000 CR250R front brake caliper)** is a solid choice if you prioritize **reliability, exact fitment, and long-term compatibility** with your bike. It s ideal for riders who want to maintain the stock character of their CR250R or those who prefer OEM parts for simplicity and ease of service. However, if your primary goal is **performance improvement, cost savings, or customization**, aftermarket alternatives might be worth considering.

- Riders who want a **direct replacement** without modifying the bike s braking system.

- Those who prefer **proven Honda quality** and don t need performance upgrades.

- Owners who plan to **keep the bike in stock condition** for resale or classic riding.

If you re on a budget or seeking performance enhancements, explore aftermarket options from reputable brands like **Brembo, Magura, or EBC**, which may offer better value or upgrades. Always ensure the part is genuine to avoid quality issues.

- You need a **direct OEM replacement** for your 2000 CR250R.

- You value **reliability and ease of installation** over performance gains.

- You re willing to pay a premium for a **proven, high-quality part** with full compatibility.

- You want **better braking performance** (e.g., larger calipers, better cooling).

- You re looking to **save money** and are comfortable with aftermarket parts.

- You suspect the original caliper has **internal damage** (e.g., seized pistons, corrosion) and need to replace other components (pads, rotors, hoses) for a full refresh.

- **Authorized Honda dealers** (for guaranteed authenticity).

- **Reputable online marketplaces** (eBay, RockAuto, Cycle World) with seller ratings and return policies.

- **Local motorcycle parts stores** that specialize in Honda or classic bikes.

Before purchasing, inspect the caliper for **visible damage, rust, or leaks**. If the bike has been neglected, consider replacing the **brake pads, rotors, and brake fluid** alongside the caliper for optimal safety.

Details:

The Ask a Question link near bottom left of this listing for quick response THIS LISTING IS PARTS PULLED FROM AN EXCELLENT RUNNING AND RIDING 2000 HONDA CR250R. All ports sealed to prevent contamination - No heavy wear broken/missing parts or pieces cracks, repairs, breaks, bends, twists, etc stripped threads/bolts Comes with everything shown in the listing pictures These are from a 2000 HONDA CR250R.

part #: 45150kz4j21 prices

• $22.50-$96.00

specifications cyclevintagee:

• for makes: Honda
• mpn: 45150-kz4-j21
• part type: Brake Caliper
• non-domestic product: No
• machine type: Dirt Bike, Off-road Motorcycle
• color: Silver
• compatible model: Cr250, Cr250r, Cr125, Cr125r
• material: Aluminum
• placement on vehicle: Front
• unit type: Unit
• compatible year: 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994
• country of origin: Japan

returns cyclevintagee:

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

payments cyclevintagee:

• other
• credit card: Discover
• wallet: Apple-pay

general cyclevintagee:

• Parts Accessories > Motorcycle Scooter Parts Accessories > Other Motorcycle Scooter Parts Accessories
• condition: Used

offer cyclevintagee:

• started: April 20, 2026
• sold: 0
• options: Ship-to-home
• availability: In Stock
• quantity: 1

seller cyclevintagee:

• city: Hutchinson, Kansas
• rating: 100.0%
• # reviews: 2000

shipping cyclevintagee:

• type: Calculated
• transit: 3-9 Days
• class: Economy, Standard, Expedited
• carrier: UPS, FedEx
• service: UPS Ground Saver, UPS Ground, FedEx Ground / FedEx Home Delivery, UPS 2nd Day Air
• cost: $8.03

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