YAMAHA 90105-07004-00 Cam Sprocket Bolts

( Part Type: Cam Sprocket Bolt ), ( Compatible Year: 1983, 1982, 1981 ), ( UPC: 901050700400 )

Review YAMAHA Cam Sprocket Bolts fits MAXIM XJ 650 1981–1983

The **Yamaha 90105-07004-00 Cam Sprocket Bolt Kit** is a meticulously engineered, high-performance replacement part designed exclusively for the **1981 1983 Yamaha Maxim XJ-650** motorcycle, ensuring precise timing and optimal engine function. These bolts are forged from **high-strength, heat-treated alloy steel**, engineered to withstand the intense mechanical stresses of the XJ-650 s overhead camshaft (OHC) valve train, where reliability and durability are paramount. Each bolt features a **fine-threaded, precision-machined design** to maintain proper camshaft alignment, preventing slippage or loosening under high RPM or aggressive riding conditions. The kit includes all necessary components typically **two or four bolts**, depending on the specific camshaft configuration along with **sealing washers or lock washers** to prevent corrosion and ensure a secure, vibration-resistant fit. Built to Yamaha s original specifications, these bolts eliminate the risk of premature wear or failure, which can lead to catastrophic timing issues, misfires, or even engine damage. Whether restoring a classic Maxim or maintaining a well-loved XJ-650, this bolt kit guarantees a seamless installation with the same level of precision found in OEM parts, allowing riders to enjoy smooth, responsive performance without compromising on quality. Ideal for mechanics and enthusiasts alike, this aftermarket replacement is a straightforward yet critical upgrade for anyone seeking to preserve the integrity of their Yamaha s valve train system.

Buying the **Yamaha 90105-07004-00 cam sprocket bolts** (or equivalent parts for a 1981 1983 Yamaha Maxim XJ650) involves weighing several factors. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of Buying These Parts**

1. **Authentic Fitment**

The 90105-07004-00 part number is Yamaha s original designation for the cam sprocket bolts on the XJ650, ensuring a precise fit without modification. This reduces the risk of misalignment or improper installation, which could lead to timing issues or engine damage.

2. **Reliability and Durability**

Yamaha parts are engineered to meet the motorcycle s original specifications, often using materials and manufacturing standards that ensure longevity. High-quality bolts are less likely to strip, stretch, or fail under normal riding conditions.

3. **Ease of Installation**

Since these are OEM (Original Equipment Manufacturer) parts, they are designed to work seamlessly with the existing components. No additional tools or adjustments are typically required beyond standard maintenance procedures.

4. **Preventative Maintenance**

Cam sprocket bolts can loosen over time due to vibration, heat, or wear. Replacing them as part of routine maintenance (e.g., during a timing belt or chain service) can prevent unexpected failures, such as a broken bolt or camshaft misalignment, which could cause catastrophic engine damage.

5. **Resale Value**

If you plan to sell the motorcycle later, having original or high-quality aftermarket parts installed can enhance its appeal to buyers who prioritize authenticity or reliability.

6. **Warranty Coverage**

Purchasing from an authorized Yamaha dealer or a reputable seller may include warranty protection, offering peace of mind in case of defects or premature failure.

7. **Compatibility with Other OEM Parts**

Using OEM bolts ensures compatibility with other original components (e.g., camshafts, timing chains, or covers), reducing the risk of cross-contamination or interference with aftermarket upgrades.

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### **Cons of Buying These Parts**

1. **Cost**

OEM parts can be more expensive than aftermarket alternatives. While the price difference may seem small for bolts, it can add up when purchasing multiple components or if you re on a tight budget.

2. **Limited Availability**

Original Yamaha parts may not be readily available from all sellers, especially for older models like the XJ650. You may need to order from specialty motorcycle parts stores, eBay, or Yamaha dealers, which could involve shipping delays or higher costs.

3. **Potential for Counterfeit or Low-Quality Parts**

Buying from untrusted sources (e.g., unknown online sellers) risks receiving counterfeit or substandard parts. These may not meet OEM specifications, leading to premature failure or improper function.

4. **Overkill for Minor Issues**

If the bolts are only slightly loose or showing minor wear, replacing them with new OEM bolts might be excessive compared to alternatives like torqueing existing bolts or using high-quality aftermarket bolts (e.g., from brands like **Torx, ACDelco, or Motul**).

5. **Time-Consuming Replacement**

Depending on your mechanical skill level, replacing cam sprocket bolts may require disassembling parts of the engine or transmission. This can be time-consuming, especially if you re unfamiliar with the process.

6. **Alternative Solutions Exist**

In some cases, aftermarket bolts (e.g., **Torx brand bolts**) are designed to meet or exceed OEM standards at a lower cost. These can be a viable alternative if you re confident in their quality.

7. **Environmental and Ethical Concerns**

Purchasing new OEM parts contributes to waste if the old parts are still functional. If you re environmentally conscious, you might consider reusing existing bolts (if they meet safety standards) or sourcing from recycled parts markets.

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### **Conclusion**

Buying the **Yamaha 90105-07004-00 cam sprocket bolts** for your 1981 1983 XJ650 is a practical choice if you prioritize **authenticity, reliability, and long-term engine health**. These bolts are a critical component for maintaining proper camshaft timing, and using OEM parts minimizes risks associated with misalignment or failure. However, the decision should also consider **budget constraints, part availability, and whether the bolts are truly necessary** (e.g., if they re only slightly loose).

If you re comfortable with aftermarket alternatives and have verified their quality (e.g., Torx or similar brands), you may save money without sacrificing performance. Conversely, if you re performing a **major overhaul, restoring the bike to stock condition, or unsure about the condition of existing bolts**, OEM parts are the safest option.

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### **Recommendation**

Purchase the **Yamaha 90105-07004-00 bolts** from an **authorized Yamaha dealer or a trusted motorcycle parts supplier** (e.g., **Cycle World, Cycle Gear, or a local Yamaha specialist**). Verify the part number and ensure it matches your model year (1981 1983). This ensures you get genuine parts with warranty support.

Consider **high-quality aftermarket bolts** (e.g., **Torx brand**) that are designed for camshaft applications. Ensure they meet or exceed the torque specifications for your engine (typically **25 30 ft-lbs** for Yamaha XJ650 bolts). Check reviews or consult a mechanic to confirm compatibility.

Inspect them for **stripping, elongation, or cracks**. If they re still in good condition but slightly loose, you can **retorque them to specification** (consult your service manual) or use **thread-locking compound** (e.g., Loctite 271) to prevent future loosening. Only replace if they re visibly damaged or show signs of failure.

- **Authorized Yamaha Dealers** (for OEM parts with warranty).

- **Specialty Motorcycle Parts Stores** (e.g., **Cycle Gear, Cycle World, or local Yamaha specialists**).

- **Reputable Online Retailers** (e.g., **eBay, Amazon, or RockAuto**), but **verify seller ratings and part authenticity**.

- **Used/Recycled Parts Markets** (if you re confident in the condition of pre-owned bolts).

- Follow the **torque specifications** in your service manual (usually **25 30 ft-lbs** for these bolts).

- Use a **torque wrench** to avoid over-tightening, which can strip threads.

- If replacing the timing chain or camshaft, ensure the **cam sprocket is properly aligned** with the crankshaft sprocket to avoid timing issues.

- Consider **replacing the bolts in pairs** (e.g., both bolts on one side at a time) to maintain even tension.

By weighing these factors, you can make an informed decision that balances **cost, reliability, and practicality** for your XJ650.

Details:

2 sprocket bolts off a 1982 Maxim XJ650.

part #: 901050700400 prices

• $6.49-$152.95

specifications cyclevintagee:

• for models: Xj, 650, Maxim
• for makes: Yamaha
• for years: 1981-1983
• part type: Cam Sprocket Bolt
• compatible year: 1983, 1982, 1981
• upc: 901050700400

offer cyclevintagee:

• quantity: 1
• availability: In Stock
• started: March 26, 2026
• sold: 0
• options: Ship-to-home

general cyclevintagee:

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

payments cyclevintagee:

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

returns cyclevintagee:

• policy: No Returns

seller cyclevintagee:

• city: Portland, Oregon
• rating: 100.0%
• # reviews: 949

shipping cyclevintagee:

• service: USPS Ground Advantage
• class: Standard
• cost: $0.00
• transit: 5-11 Days
• carrier: USPS
• type: Fixed

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