HONDA 90012-333-000 Tappet Screw Nut Z50

( Manufacturer Part Number: 90012-333-000 ), ( Part Type: Tappet Screw ), ( Machine Type: Street Motorcycle ), ( Color: Silver ), ( Material: Steel ), ( Vintage Part: Yes ), ( Placement On Vehicle: Front ), ( California Prop 65 Warning: Caution A Manufactured Item ), ( Unit Type: Unit ), ( Manufacturer Warranty: No ), ( Compatible Year: 1975, 1974, 1973 ), ( Country Of Origin: Japan )

Review HONDA Tappet Screw And Nut Z50 fits CB350F CT70 CT90 XR 2010

The **Honda 90012-333-000 Tappet Screw Nut** is a precision-engineered component designed specifically for the **CB350F** and its variants, including the **Z50, CT70, CT90, and XR** models from Honda s classic and adventure-oriented motorcycle lineup. This high-quality, zinc-plated steel nut is a critical part of the valve train system, ensuring proper tension and alignment of the tappets (or lifters) within the engine s overhead valve mechanism. Crafted to Honda s exacting standards, this nut features a **fine-threaded design** that securely locks into place, preventing loosening under the high-stress conditions of engine operation. Its **hexagonal shape** allows for easy installation and removal with the appropriate socket or wrench, while its durable construction resists wear and corrosion, even in demanding riding environments. Whether you re restoring a vintage CB350F, maintaining a classic CT70, or upgrading an XR model, this genuine Honda part guarantees a reliable fit and optimal performance, helping to maintain smooth valve operation and engine longevity. Perfect for mechanics and enthusiasts alike, it s a must-have replacement for those seeking authenticity and durability in their motorcycle s valve train assembly.

### **Pros and Cons of buying a Honda 90012-333-000 Tappet Screw Nut (CB350F, 10 Z50, CT70, CT90, XR50)**

1. **Direct Fitment** This part is designed specifically for Honda engines (CB350F, Z50, CT70, CT90, XR50), ensuring compatibility without modification.

2. **High-Quality Material** Honda parts are generally made from durable materials, reducing the risk of premature wear or failure.

3. **Easy Installation** The screw nut is a straightforward component, requiring minimal tools (socket wrench, torque wrench) and no specialized skills.

4. **Prevents Valve Issues** A worn or missing tappet screw nut can lead to valve float or improper valve clearance, so replacing it helps maintain engine performance.

5. **Cost-Effective** Compared to labor costs for engine rebuilds or valve adjustments, this is a relatively inexpensive fix.

6. **Prevents Further Damage** Ignoring a faulty tappet screw nut can lead to more severe engine damage, making this a proactive maintenance step.

7. **Aftermarket Availability** If the original part is unavailable, this Honda OEM part ensures reliability over cheaper aftermarket alternatives.

1. **Limited Availability** Depending on the region, this part may be hard to find in physical stores, requiring online purchases (eBay, Amazon, Honda dealerships).

2. **Potential Counterfeit Risk** Buying from unverified sellers could result in fake or low-quality parts that fail prematurely.

3. **Torque Specifications Must Be Followed** Over-tightening or under-tightening can damage threads or cause leaks, requiring careful attention.

4. **May Require Engine Disassembly** Accessing the tappet screw nut often means removing the cylinder head or carburetor, which may not be ideal for inexperienced DIYers.

5. **No Warranty on Used/Aftermarket Parts** If purchasing from a third party, warranty coverage may be limited or nonexistent.

6. **Time-Consuming for Beginners** If unfamiliar with engine work, the process could take longer than expected, especially if additional components need adjustment afterward.

---

### **Conclusion**

The **Honda 90012-333-000 tappet screw nut** is a **practical and necessary replacement** for engines showing signs of valve or tappet issues. Its **direct fitment, durability, and cost-effectiveness** make it a strong choice for maintenance. However, **availability, potential counterfeit risks, and installation complexity** are factors to consider.

If you re comfortable with basic engine work and can source the part from a **reputable seller**, this is a **wise investment** to prevent costly engine damage. For those unsure about installation, consulting a mechanic may be preferable.

- **Buy from an authorized Honda dealer or a trusted online retailer** (e.g., RockAuto, Amazon, or eBay with seller feedback) to ensure authenticity.

- **Verify torque specifications** (typically **10 15 Nm** for these models) to avoid damage.

- **Consider professional installation** if unsure about engine disassembly or valve adjustments.

- **Check for accompanying parts** (e.g., new valve springs, shims) if the engine shows other signs of wear.

This part is **worth the purchase** for long-term engine reliability, especially in older or high-mileage bikes.

Details:

E As pictured. I probably bought these and just never used them. Box working Tappet and nut Hagar Bx#5 item#depend #tappet and nut 90012-333-000 CB350F Four I think these are new but am not positive.

part #: 90012333000 prices

• $5.95-$11.52

specifications cyclevintagee:

• for models: Cb350f, Ct70, Ct90, Xr
• for makes: Honda
• for years: 2010
• mpn: 90012-333-000
• part type: Tappet Screw
• machine type: Street Motorcycle
• color: Silver
• material: Steel
• vintage part: Yes
• placement on vehicle: Front
• california prop 65 warning: Caution A Manufactured Item
• unit type: Unit
• manufacturer warranty: No
• compatible year: 1975, 1974, 1973
• country of origin: Japan

payments cyclevintagee:

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

shipping cyclevintagee:

• type: Fixed
• carrier: USPS
• service: USPS Ground Advantage
• class: Standard
• transit: 4-9 Days
• cost: $6.95

offer cyclevintagee:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 8
• started: March 31, 2026

seller cyclevintagee:

• city: Seattle, Washington
• # reviews: 4923
• rating: 99.6%

general cyclevintagee:

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

returns cyclevintagee:

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

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