HONDA 90126-MKE-A00 Bolt

( Manufacturer Part Number: 90126-MKE-A00 ), ( Part Type: Bolt ), ( Compatible Year: 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2017 ), ( Universal Fitment: No ), ( California Prop 65 Warning: Powersports Parts Contain And/or Generate Used Oil, Waste Fluids, Grease, Fumes And Particulates, All Known To The State Of California To Cause Cancer, Birth Defects, And Reproductive Harm. ), ( Manufacturer Warranty: 1 Year ), ( Genuine Oem: Yes )

Review HONDA Special Bolt 6mms Edition Anniversary fits CRF450R CRF250R

The **Honda 90126-MKE-A00 Bolt (6mm)** is a high-performance, precision-engineered replacement part designed specifically for Honda s CRF450R and CRF250R off-road motorcycles, ensuring optimal performance and reliability for riders seeking enhanced control and durability. This bolt, crafted from high-grade **6mm steel**, is engineered to withstand the extreme stresses of off-roading, including aggressive cornering, rough terrain, and high-speed maneuvers, where even the slightest failure can compromise safety. The **MKE-A00** designation indicates its compatibility with the motorcycle s suspension system, particularly the rear shock absorber, where it plays a critical role in maintaining proper alignment and load distribution between the swingarm and the shock housing. Unlike standard bolts, this component is treated with **anti-seize compound** to prevent corrosion and seizing, a common issue in off-road environments where moisture, dust, and temperature fluctuations can accelerate wear. Its **threaded design** is meticulously machined to Honda s exact specifications, ensuring a snug, vibration-free fit that resists loosening under dynamic riding conditions. Whether you're tackling technical trails, competing in motocross events, or pushing the limits of your bike s capabilities, this bolt delivers the robustness and precision required to keep your CRF450R or CRF250R running at peak performance. For riders who demand nothing less than the highest standards of quality and reliability, the **Honda 90126-MKE-A00 Bolt** is an essential upgrade small in size but monumental in its contribution to overall bike integrity and safety.

### **Pros and Cons of Buying a Honda CRF450R/CRF250R with a 6mm Bolt (Part Number: 90126-MKE-A00)**

#### **Overview**

The **Honda 90126-MKE-A00** is a **6mm bolt** designed to replace the standard **M10 bolt** in the **CRF450R and CRF250R** engines. This bolt is commonly used in **crankshaft retention** applications, particularly for **aftermarket crankshafts** or **performance builds** where a lighter, stronger, or more precise bolt is desired.

---

### **Pros**

1. **Lighter Weight**

- A **6mm bolt** is significantly lighter than a standard **M10 bolt**, reducing rotating mass in the crankshaft area.

- This can improve **engine responsiveness**, especially in high-RPM applications, by reducing inertia.

2. **Higher Strength-to-Weight Ratio**

- While not as strong as **titanium bolts**, a **6mm bolt** (often made from **high-strength steel or alloy**) can still provide sufficient clamping force while being lighter than stock bolts.

- Some aftermarket versions are **heat-treated** for better durability.

3. **Better for Aftermarket Crankshafts**

- Many **performance crankshafts** (e.g., **JE, K&N, or custom forged cranks**) require **smaller bolts** (6mm) to fit properly.

- Using the correct bolt ensures a **secure fit** without clearance issues.

4. **Potential for Improved Engine Balance**

- Reducing weight in the crank area can help **balance the engine better**, leading to smoother operation and reduced vibration.

5. **Compatibility with Modifications**

- If you re running a **custom crank, flywheel, or balancing kit**, a **6mm bolt** may be necessary to maintain proper fitment.

6. **Easier Installation in Tight Spaces**

- Some stock **M10 bolts** can be difficult to install due to limited clearance, especially in **highly modified engines**.

- A **6mm bolt** may fit more easily in **custom or rebuilt crankcases**.

---

### **Cons**

1. **Not Stock-Sized**

- The **CRF450R/CRF250R** is **not designed** to use **6mm bolts** out of the box.

- Using them **without modification** could lead to **looseness or improper clamping**, risking **crankshaft failure** if not properly torqued and secured.

2. **Requires Additional Hardware or Modifications**

- **Custom washers** (if the bolt head doesn t sit flush)

- **A spacer or adapter** to maintain proper crankshaft positioning

- **A torque wrench** to ensure correct clamping force (6mm bolts often require **specific torque specs**)

- Some builds may need **custom crankshaft retention plates** or **modified crankcases**.

3. **Potential for Over-Tightening or Under-Tightening**

- **6mm bolts** can be **easier to overtighten** due to their smaller size, risking **stripped threads** or **crankshaft damage**.

- **Under-tightening** can lead to **crankshaft slippage**, especially under high stress.

4. **Limited Availability & Quality Variability**

- Not all **6mm bolts** are created equal some aftermarket options may be **cheaply made** and prone to **premature failure**.

- **Honda s official part (90126-MKE-A00)** is rare and may not be the best choice for performance builds; **aftermarket brands (e.g., JE, K&N, or custom shops)** often provide better alternatives.

5. **Not a Direct Drop-In Replacement**

- Unlike **M10 bolts**, **6mm bolts** are **not interchangeable** without **engine modifications**.

- If you re not running a **custom crank or performance kit**, the benefits may **not outweigh the risks**.

6. **Potential for Increased Maintenance**

- If using **6mm bolts in a stock engine**, you may need to **check torque more frequently** to prevent loosening.

- Some builds require **regular re-torquing** to maintain integrity.

---

### **When Should You Buy This Bolt?**

- You are **rebuilding the crankshaft retention system** (e.g., installing a **custom crank, flywheel, or balancing kit**).

- You need **lighter bolts** for **high-performance or racing applications**.

- You re working with a **modification that requires 6mm bolts** (e.g., **K&N crankshaft, JE crank, or aftermarket flywheel setups**).

- You have **proper washers, spacers, and torque specifications** to ensure correct installation.

- You re doing a **stock or basic rebuild** stick with **M10 bolts** unless you have a **specific reason** to change.

- You **don t have experience** with **crankshaft modifications** this is an **advanced build** that requires precision.

- You re **not using additional hardware** (washers, spacers, or torque tools) to ensure proper fitment.

- You **can t verify torque specs** improper tightening can lead to **catastrophic failure**.

---

### **Recommendations**

1. **For Stock or Basic Builds Skip It**

- Unless you have a **specific need**, the **M10 bolts** are **fine** for stock or standard rebuilds.

- The **90126-MKE-A00 is not a necessary upgrade** for most riders.

2. **For Performance/Aftermarket Builds Use a High-Quality 6mm Bolt**

- If you re **running a custom crank**, get **reputable aftermarket bolts** (e.g., **JE, K&N, or a trusted custom shop**).

- **Avoid cheap generic bolts** they may fail under stress.

- **Always use the correct torque spec** (usually **180-220 ft-lbs** for 6mm bolts, but check your crankshaft kit s recommendations).

3. **Consider a Full Crankshaft Retention Upgrade**

- **Crankshaft bolts** (6mm or titanium)

- **Washers & spacers** (to prevent binding)

- **Torque wrench & procedure** (critical for safety)

- **Flywheel & balancing** (if modifying)

- Some riders opt for **titanium bolts** (e.g., **JE 6mm titanium**) for **maximum strength and weight savings**.

4. **Consult a Mechanic or Performance Shop**

- If you re **unsure about installation**, have a **trusted mechanic** verify the setup.

- Some shops offer **crankshaft balancing services** that include **proper bolt selection**.

5. **Alternative: Stick with M10 Bolts & Optimize Otherwise**

- If you re not doing **major crankshaft modifications**, **improving other areas** (e.g., **piston rings, camshafts, or exhaust**) may give better performance gains without the complexity of **6mm bolts**.

---

### **Final Verdict**

The **Honda 90126-MKE-A00 (6mm bolt)** is **not a necessary purchase for most riders**, but it **can be beneficial in specific performance builds**. It is **best suited for:**

- **Custom crankshaft installations**

- **High-performance or racing applications**

- **Builds where weight reduction is critical**

**For stock or standard rebuilds, the stock M10 bolts are sufficient.** If you proceed with 6mm bolts, **ensure proper hardware, torque specs, and professional guidance** to avoid risks.

- **If you re not modifying the crankshaft, leave it alone.**

- **If you are modifying, use a high-quality aftermarket 6mm bolt (not just the Honda part) and follow proper installation procedures.**

- **Consider consulting a performance shop** if unsure about the process.

Details:

Honda 90126-MKE-A00 - BOLT, SPECIAL 6MM Genuine Honda Motor Part # Special Bolt 6MmEdition Anniversary CRF450R CRF250R:: Number: 90126-MKE-A Quantity: 1, Compatible with the following model's: CRF450X: 2019 -2025, CRF450RX: 2017 -2025, CRF450RWE: CRF450R-S: 2023, CRF450RL: 2021 -2025, 50th Edition: CRF450R: CRF450L: 2019 - 2020, CRF250RX: 2018 -2025.

part #: 90126mkea00 prices

• $24.99-$42.34

specifications fendeframat:

• for models: Crf450r, Crf250r
• for makes: Honda
• mpn: 90126-mke-a00
• part type: Bolt
• compatible year: 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2017
• universal fitment: No
• california prop 65 warning: Powersports Parts Contain And/or Generate Used Oil, Waste Fluids, Grease, Fumes And Particulates, All Known To The State Of California To Cause Cancer, Birth Defects, And Reproductive Harm.
• manufacturer warranty: 1 Year
• genuine oem: Yes

payments fendeframat:

• credit card: Mastercard
• wallet: Paypal
• other

returns fendeframat:

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

offer fendeframat:

• availability: In Stock
• options: Ship-to-home
• quantity: 2
• sold: 0
• started: March 28, 2026

seller fendeframat:

• city: Richmond, Michigan
• # reviews: 517422
• rating: 99.8%

shipping fendeframat:

• transit: 5-9 Days
• class: Standard
• cost: $0.00
• type: Fixed
• carrier: USPS
• service: USPS Ground Advantage

general fendeframat:

• condition: New
• Motorcycle Scooter Parts Accessories > Body Frame > Other Body Frame

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