fits model: 850. year: 1975.

( Brand: Norton ), ( Manufacturer Part Number: 06-5874 ), ( Part Type: Tachometer Work ), ( Vintage Part: Yes ), ( Country Of Origin: France )
The **Norton 06-5874 75 850 MKIII Tachometer with Cracked Glass** is a rare and highly sought-after piece of classic motorcycle history, embodying the timeless engineering and mechanical artistry of the legendary British motorcycle manufacturer. Originally installed on the iconic Norton 750 and 850 cc models particularly the **MKIII (Mark III) variants** produced between the late 1960s and early 1970s this tachometer represents a critical component of the bike s performance and functionality. Crafted with Norton s signature blend of precision and durability, the instrument features a robust, cast-aluminum housing that houses a high-precision mechanical counter, allowing riders to monitor engine RPM with unmatched accuracy. The **cracked glass** adds a layer of authenticity and character, hinting at the tachometer s well-loved history, likely from decades of use on a bike that has seen countless miles and adventures. The dial itself is adorned with Norton s classic branding, complete with the recognizable **red and white markings**, including a prominent red "N" at the top and a sweeping black pointer that glides effortlessly across the numbered scale. Beneath the glass, the intricate inner workings including the delicate gears and spring mechanisms demonstrate the mechanical sophistication of the era, where analog instrumentation reigned supreme. While the cracked glass may suggest some wear, this very imperfection lends the tachometer a vintage charm that appeals to collectors and enthusiasts who appreciate the raw, unpolished beauty of classic motorcycle parts. Whether installed on a restored Norton 750 or 850 MKIII or displayed as a standalone piece in a mechanical museum, this tachometer stands as a testament to Norton s golden age of motorcycle engineering a relic of an era when British bikes dominated the roads with power, precision, and unmatched craftsmanship.
### Pros and Cons of Buying a **Norton 06-5874 75 850 MK3 MKIII (Tachometer with Cracked Glass)**
#### **Pros:**1. **Classic Norton Motorcycle** The Norton 750/850 MK3 is a legendary British motorcycle known for its timeless design, mechanical reliability, and cult following. Owning one means joining a community of enthusiasts who appreciate its heritage.
2. **Strong Engine** The 750cc or 850cc parallel-twin engine is robust and capable of producing around **50-60 bhp**, making it suitable for both cruising and spirited riding. The engine is well-built and can last decades with proper maintenance.
3. **Mechanical Simplicity** Compared to modern bikes, the Norton has a straightforward mechanical design, which can be easier to repair and modify. Many parts are still available from aftermarket suppliers and Norton specialists.
4. **Customization Potential** The Norton MK3 is highly modifiable. You can upgrade the engine (e.g., with a Norton Performance or other aftermarket kits), suspension, exhaust, and even the frame for a more modern feel.
5. **Vintage Appeal** If you enjoy the look and feel of classic British motorcycles, the Norton s retro styling with its distinctive fuel tank, handlebars, and frame offers a unique aesthetic that many riders find appealing.
6. **Potential for Restoration** If the bike is in rough condition, a well-executed restoration can turn it into a showstopper. Many owners take pride in bringing these bikes back to their original glory.
7. **Community & Support** There are active Norton clubs and forums where owners share knowledge, parts, and restoration tips. This can be invaluable when dealing with a classic bike.
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#### **Cons:**1. **Cracked Tachometer Glass** The most immediate issue is the damaged tachometer. While this is a minor cosmetic flaw, it could indicate neglect or previous accidents. If the glass is cracked, it may need replacement, which could be a small expense but adds to the upfront cost.
2. **Age & Wear** These bikes are from the **1970s-1980s**, meaning they may have worn-out components like belts, bearings, brakes, and suspension. A thorough inspection is essential to avoid hidden mechanical issues.
3. **Maintenance Requirements** Unlike modern bikes with sealed components, the Norton requires regular upkeep, including chain adjustments, belt tensioning, valve adjustments, and carburetor tuning. Neglect can lead to costly repairs.
4. **Parts Availability** While many parts are still available, some may require special ordering, especially for rare or discontinued components. Stocking up on essentials (belts, filters, etc.) is wise.
5. **Fuel & Emissions** Modern fuel contains additives that can degrade rubber and plastics in older engines. Some riders report fuel system issues (e.g., sticky carburetors) due to this. Using **pre-1990 fuel** or additives like **Seafoam** can help mitigate this.
6. **Safety Concerns** The bike s age means it may lack modern safety features like ABS, traction control, or advanced braking systems. Riding dynamics (especially with a heavy rider) can be less predictable than on a modern bike.
7. **Resale Value** While classic Nortons hold value among enthusiasts, they are not a sound long-term investment. If you plan to sell later, the market is niche, and depreciation is inevitable.
8. **Riding Experience** The upright riding position and heavier weight (around **200-220 kg / 440-485 lbs**) can be tiring on long rides. The suspension is basic, and modern roads may feel harsh compared to modern bikes.
9. **Cost of Repairs** While parts are often cheap, labor costs for specialized mechanics can add up. If the bike needs major work (e.g., engine rebuild, frame repair), expenses can become significant.
10. **Legal & Insurance Issues** Some insurance providers may charge higher premiums for classic bikes due to perceived higher risk. Additionally, some countries have strict emissions or safety standards that may require modifications.
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### **Ending Conclusion:**Buying a **Norton 06-5874 75/850 MK3 with a cracked tachometer** can be a rewarding experience if you are passionate about classic motorcycles and willing to invest time and effort into maintaining it. The bike offers a unique blend of history, mechanical charm, and customization potential. However, it also comes with challenges potential mechanical issues, higher maintenance costs, and a less forgiving riding experience compared to modern bikes.
If you are prepared for the work involved, enjoy the restoration process, and want a bike that stands out on the road, this Norton could be an excellent choice. **But if you prioritize convenience, modern safety features, or a hassle-free riding experience, a modern classic or a well-maintained modern bike might be a better fit.**
### **Recommendation:**- **Buy if:** You are an experienced rider, have mechanical skills (or access to a good mechanic), and love the idea of restoring and riding a piece of motorcycle history. Budget for repairs and consider this a long-term project rather than a quick purchase.
- **Avoid if:** You want a bike that requires minimal upkeep, have limited mechanical knowledge, or prefer the safety and comfort of a modern machine.
- **Before buying:** Get a **full mechanical inspection** (especially engine, belts, brakes, and frame). Test-ride the bike and check for any hidden damage. Consider negotiating the price based on the cracked tachometer and overall condition.
- **Alternative options:** If you like the Norton but want something more reliable, look for a **restored or well-maintained MK3** with a lower mileage or consider a **Norton Commando** (which is more modern and easier to maintain).
Ultimately, this Norton could be a fantastic project bike for the right owner but it s not a "plug-and-play" purchase.
Has cracked glass. Pictured to show part number of speedometer. Norton 850 MK3 Tachometer part # 06-5874 This is a Correct OEM for 75 MK3, works. Whiz Location BMW section Jacket #4 This is a Correct OEM part for 75 Norton 850 MK3.
Parts Book not included.