KAWASAKI 12048-001 Idler Chain Roller

( Brand: Kawasaki ), ( Manufacturer Part Number: 12048-001 ), ( Part Type: Idler Roller Chain ), ( Machine Type: Street ), ( Color: Black ), ( Compatible Model: Z1 Kz Z1r 900 1000 73-80 ), ( Material: Hanging Idler ), ( Vintage Part: Yes ), ( Compatible Year: 1980, 1979, 1978, 1977, 1976, 1975, 1974, 1973 ), ( Placement On Vehicle: Rear ), ( Country Of Origin: Japan )

Review KAWASAKI Oem Genuine Hanging Idler Can Chain Roller fits Z1 KZ 900 1000 1973-80

The **Kawasaki 12048-001 Idler Chain Roller** is a meticulously engineered, high-performance component designed exclusively for the iconic **1973 1980 Kawasaki Z1 (KZ900/KZ1000)** models, ensuring optimal chain tension and smooth operation of the motorcycle s drive system. Crafted from durable **heat-treated steel**, this precision-machined roller is built to withstand the rigorous demands of high-speed riding, aggressive cornering, and prolonged use without compromising performance or reliability. The **spherical roller bearing** integrated into its design minimizes friction and wear, allowing the chain to glide effortlessly over the sprocket while maintaining consistent tension critical for preserving the longevity of both the chain and the rear sprocket. Its **interchangeable fitment** across the Z1 s various engine displacements (900cc and 1000cc) makes it a versatile upgrade or replacement part for enthusiasts seeking to restore stock functionality or enhance durability. Whether restoring a classic Z1 to its original glory or optimizing a modified rig for track days, this idler chain roller delivers the precision and robustness required to keep the drivetrain running at peak efficiency. Its **OEM-level quality** ensures compatibility with the Z1 s unique chain routing and tensioning system, while its **rust-resistant finish** protects against corrosion, making it a dependable choice for riders who demand both performance and longevity from their motorcycle s drivetrain components.

### Pros and Cons of Buying a Kawasaki 12048-001 (1973 1980 Z1/KZ900/1000 Idler Chain Roller)

#### **Pros**

1. **Classic Design and Legacy**

The Kawasaki Z1 (and its variants like the KZ900 and KZ1000) is one of the most iconic motorcycles of the 1970s, known for its aggressive styling, smooth V-twin engine, and influence on modern sportbikes. Owning one allows you to ride a piece of automotive history.

2. **Strong Engine Performance**

The 904cc (Z1) and 996cc (KZ1000) air-cooled V-twins produce reliable power, especially when properly maintained. With the right modifications (such as a performance camshaft or carburetor upgrades), these engines can deliver satisfying acceleration and a deep, resonant exhaust note.

3. **Modularity and Customization Potential**

The Z1/KZ platform is highly modifiable. Aftermarket parts, including performance exhausts, carburetors, cranks, and even modern fuel injection conversions, are widely available. The bike s simplicity also makes DIY maintenance and upgrades accessible to enthusiasts.

4. **Community and Support**

The Z1/KZ has a dedicated following with extensive forums (e.g., Z1.org, Kawasaki Z1 forums), restoration guides, and parts swaps. This means troubleshooting help, restoration advice, and access to rare or used components are readily available.

5. **Reliability (With Proper Care)**

When maintained correctly, these bikes can last decades. Many Z1s and KZ1000s still run strong today, especially those with original engines that have been rebuilt or restored. The simplicity of the design (compared to modern electronics) makes it easier to diagnose and fix issues.

6. **Nostalgia and Collectibility**

For enthusiasts, these bikes hold sentimental value. Some models (especially rare or high-mileage examples) appreciate in value over time, particularly if they are well-preserved or restored to showroom condition.

7. **Lower Operating Costs (Compared to Modern Bikes)**

Fuel efficiency is modest by today s standards, but parts and labor costs are significantly lower than for modern sportbikes. Basic maintenance (oil changes, chain adjustments) is inexpensive, and used spares are plentiful.

---

#### **Cons**

1. **Age-Related Wear and Maintenance**

- **Worn-out suspension** (shocks and forks are often stiff or leaking).

- **Rust** (especially in frames, exhausts, and fuel tanks if stored improperly).

- **Carburetor drift** (older Keihin or Mikuni carbs require frequent tuning).

- **Chain and sprocket wear** (the idler chain roller you re asking about is a critical but often neglected part; a worn chain can cause excessive noise and poor shifting).

- **Electrical gremlins** (ignition coils, switches, and wiring can fail over time).

These issues require **regular attention** something a casual rider might not be prepared for.

2. **High Mileage and Engine Condition**

- **Rod bearing wear** (common in high-mileage examples; symptoms include blue smoke or knocking).

- **Camshaft and lifter wear** (can cause rough idle or poor performance).

- **Cylinder head leaks** (valve seals or gaskets may fail, leading to oil in the carburetor).

A **full engine rebuild** can cost **$1,500 $3,000 **, depending on labor rates.

3. **Safety Concerns**

- **Rigid frame and outdated ergonomics**: The Z1/KZ was designed for a different era of riding. Modern riders may find the **narrow seat, high handlebars, and lack of wind protection** uncomfortable for long rides.

- **Poor modern safety standards**: No ABS, minimal crash protection, and outdated braking systems (drum brakes on some models) make it less safe than contemporary bikes.

- **Tire and brake wear**: Original or high-mileage tires may be worn thin, and drum brakes (if equipped) are less effective than modern disc setups.

4. **Fuel and Emissions Issues**

- **Carbureted design**: Tuning can be finicky, especially in humid or high-altitude conditions. Modern fuel (higher ethanol content) can cause carburetor clogging.

- **No modern emissions compliance**: While not a legal issue for private use, some states may require modifications to pass smog checks if ridden on public roads.

5. **Parts Availability and Cost**

- **New OEM parts are scarce**: Many components (e.g., original carburetors, gaskets, or specific bolts) are discontinued. Aftermarket parts fill the gap but may not always match quality.

- **Labor-intensive repairs**: Some jobs (e.g., rebuilding the transmission or valve train) require specialized tools and knowledge, increasing repair costs.

6. **Riding Experience Limitations**

- **Top speed and acceleration**: While fast for its time, the Z1/KZ is **outclassed by modern sportbikes** in straight-line speed and cornering ability. The suspension is stiff by today s standards, making it less comfortable on rough roads.

- **Fuel capacity**: Only **3.5 gallons** means frequent stops, which can be inconvenient on long trips.

7. **Resale Value (Unless Restored)**

A well-maintained, restored Z1/KZ can hold value, but a **project bike** or one with major issues will depreciate quickly. Many buyers are only interested in **showroom-ready** examples.

---

### **Conclusion and Recommendation**

- You are a **restoration enthusiast** who enjoys the challenge of bringing a vintage bike back to life.

- You prioritize **nostalgia, customization, and community** over modern convenience.

- You have **mechanical skills** (or access to a trusted mechanic) to handle maintenance and potential engine issues.

- You plan to **ride it lightly** (e.g., track days, short commutes, or cruising) and are okay with its limitations.

- You find the **aesthetic and legacy** of the Z1/KZ more important than raw performance.

- You want a **reliable, low-maintenance** bike for daily use or long-distance touring.

- You are not prepared for **unexpected repair costs**, especially if the engine or transmission needs work.

- You prefer **modern safety features** (ABS, traction control, better brakes) and ergonomics.

- You dislike **frequent tuning and adjustments** (carburetors, valves, chain tension).

- You are looking for a **high-performance** bike modern sportbikes will outclass it in speed and handling.

If you re **serious about restoring or modifying** the bike and have the budget for potential repairs, a **well-documented Z1/KZ1000 with a clean engine and minimal rust** is a rewarding project. However, if you re buying it **as-is without a restoration plan**, be prepared for **hidden costs** and limitations in comfort and performance.

- **Buying a restored example** from a reputable seller (check for service records).

- **Starting with a less expensive variant** (e.g., a KZ900 instead of a KZ1000) if budget is a concern.

- **Budgeting for a full rebuild** (engine, transmission, suspension) upfront if you plan to ride it regularly.

Ultimately, the Kawasaki Z1/KZ is a **fantastic bike for the right owner** one who appreciates its history and isn t afraid of a little work. But it s not a "set it and forget it" machine.

Details:

No cracks or chipping. Both are clean and in good shape. Genuine Kawasaki OEM Hanging Idler Large Roller. Comes as you see in pics.

part #: 12048001 prices

• $26.09-$27.89

specifications cyclevintagee:

• for models: Z1, Kz, 900, 1000
• for makes: Can, Kawasaki
• for years: 1973-80
• brand: Kawasaki
• mpn: 12048-001
• part type: Idler Roller Chain
• machine type: Street
• color: Black
• compatible model: Z1 Kz Z1r 900 1000 73-80
• material: Hanging Idler
• vintage part: Yes
• compatible year: 1980, 1979, 1978, 1977, 1976, 1975, 1974, 1973
• placement on vehicle: Rear
• country of origin: Japan

offer cyclevintagee:

• availability: In Stock
• options: Ship-to-home
• started: March 6, 2026
• sold: 0
• quantity: 1

payments cyclevintagee:

• wallet: Apple-pay
• credit card: Diners-club
• other
• money order
• cash

shipping cyclevintagee:

• transit: 5-11 Days
• cost: $6.95
• type: Fixed
• carrier: USPS
• class: Standard
• service: USPS Ground Advantage

returns cyclevintagee:

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

general cyclevintagee:

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

seller cyclevintagee:

• city: Springfield, Ohio
• rating: 100.0%
• # reviews: 37648

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