HARLEY-DAVIDSON 36869-70 Big Clutch Spacer Block
fits model: Twin. make: Harley. year: 1970-78.
( Brand: Harley-davidson ), ( Manufacturer Part Number: 36869-70 ), ( Part Type: Clutch Spacer Block ), ( Compatible Make: For Harley-davidson ), ( Compatible Model: Knucklehead Panhead Ul ), ( Surface Finish: Raw Cast Aluminum ), ( Vintage Part: Yes ), ( Placement On Vehicle: Left, Front )
Review HARLEY DAVIDSON Big Foot Clutch Spacer Block Oem fits TWIN 1970-78
The **Harley-Davidson 36869-70 1970-78 Big Twin Clutch Spacer Block** is a meticulously engineered, high-performance component designed exclusively for the iconic **1970 through 1978 Harley-Davidson Big Twin** engines, specifically the **Evo (Electronically Controlled Ignition) and non-Evo models** featuring the legendary **74-cubic-inch (1,212cc) air-cooled V-twin**. This clutch spacer block serves as a critical intermediary between the engine s flywheel and the transmission, ensuring precise alignment, optimal torque transfer, and enhanced durability key factors in maintaining the raw, unfiltered power and smooth operation that Harley-Davidson enthusiasts demand.
Crafted from **high-grade cast iron**, this spacer block is built to withstand the immense stress and heat generated by the Big Twin s robust power delivery, which was renowned for its deep-throated growl and relentless low-end torque. The design incorporates a **precision-machined bore** that perfectly interfaces with the engine s flywheel housing, while the **integrated mounting studs** provide a secure, vibration-dampening connection to the transmission. This alignment is crucial for minimizing backlash, reducing wear on the clutch and flywheel, and preventing premature failure of the drivetrain components common issues in high-mileage or heavily modified Big Twins.
Beyond its functional role, this clutch spacer block is a nod to the **mechanical simplicity and rugged reliability** that defined Harley-Davidson s golden era. Unlike modern, lightweight alternatives, this component embodies the **brutal durability** of the original design, making it a sought-after upgrade for both **restoration projects** and **high-performance builds**. Whether you re restoring a classic **1970-78 Big Twin** to its former glory or pushing an already modified bike to its limits, this spacer block ensures that the engine s power is transmitted cleanly and efficiently, without the compromises of aftermarket substitutes. For purists and performance seekers alike, it represents the perfect balance of **authenticity, strength, and performance** a true testament to Harley-Davidson s engineering legacy.
### **Pros and Cons of Buying a Harley-Davidson 36869-70 (1970-78) Big Twin Clutch Spacer Block**
#### **Pros**
1. **Compatibility and Functionality** This clutch spacer block is designed specifically for the Harley-Davidson Big Twin engines produced between 1970 and 1978. It serves as a critical component in maintaining proper clutch alignment and engagement, reducing wear on the clutch and transmission.
2. **Restoration and Performance** If you own or are restoring a 1970-78 Big Twin, this part is essential for ensuring smooth clutch operation. Without it, the clutch may slip or fail prematurely, leading to costly repairs.
3. **Ease of Installation** As a relatively simple mechanical component, it can be installed with basic tools, making it accessible for DIY enthusiasts.
4. **Prevents Premature Wear** The spacer ensures proper spacing between clutch components, reducing friction and extending the life of the clutch fork, pressure plate, and flywheel.
5. **Common Availability** Since it s a classic Harley part, it remains available through aftermarket suppliers, dealerships, and online marketplaces, though sourcing may require some effort.
#### **Cons**
1. **Age and Wear** If purchasing a used or refurbished unit, there s a risk of internal wear or damage, especially if the part has been improperly stored or handled.
2. **Compatibility Risks** If the wrong spacer is installed (e.g., a non-OEM or incorrect length), it could cause clutch misalignment, leading to transmission issues or damage.
3. **Cost Consideration** While not excessively expensive, the part may require additional labor if installing it yourself, and if you re restoring a full bike, other related components (clutch, flywheel, etc.) may also need attention.
4. **Limited Modern Use** Since Harley-Davidson has updated its clutch and transmission designs, this part is only relevant for older Big Twin models. Newer bikes use different systems, making this spacer obsolete for modern applications.
5. **Potential for Counterfeit Parts** As with many classic Harley components, there s a risk of purchasing a knockoff or low-quality replica, which could fail prematurely.
---
### **Conclusion**
The **Harley-Davidson 36869-70 (1970-78) Big Twin Clutch Spacer Block** is a **necessary and beneficial part** for anyone working on or restoring a vintage Big Twin motorcycle from that era. It ensures proper clutch function, prevents premature wear, and is relatively straightforward to install. However, buyers should verify authenticity, ensure correct fitment, and consider the overall condition of their bike s clutch system before purchasing.
If you re restoring or maintaining a **1970-78 Big Twin**, this part is **highly recommended** to avoid costly clutch or transmission failures. If you re not working on an eligible model, the part is **irrelevant and unnecessary**.
### **Final Recommendation**
- **Buy it if:** You own or are restoring a **1970-78 Harley-Davidson Big Twin** and need to replace or install a clutch spacer for proper function.
- **Skip it if:** You re working on a newer Harley model or a different bike type, as this part is **not compatible**.
- **Verify quality:** Purchase from a **reputable supplier** (OEM, authorized dealer, or trusted aftermarket seller) to avoid counterfeit or damaged parts.
- **Consider a full clutch rebuild:** If installing this spacer, it may be wise to inspect or replace other clutch components (flywheel, pressure plate, fork) for long-term reliability.
Details:
36869-70 HARLEY-DAVIDSON 1970-1978 BIG TWIN FOOT CLUTCH SPACER BLOCK.
part #: 3686970 prices
- $40.00-$50.99
specifications cyclevintagee:
- for models: Twin
- for makes: Harley
- for years: 1970-78
- brand: Harley-davidson
- mpn: 36869-70
- part type: Clutch Spacer Block
- compatible make: For Harley-davidson
- compatible model: Knucklehead Panhead Ul
- surface finish: Raw Cast Aluminum
- vintage part: Yes
- placement on vehicle: Left, Front
seller cyclevintagee:
- city: Saint Charles, Illinois
- # reviews: 3184
- rating: 99.2%
returns cyclevintagee:
- paid by: Seller
- time: 30 Days
- policy: Returns Accepted
shipping cyclevintagee:
- transit: 4-9 Days
- service: USPS Ground Advantage
- carrier: USPS
- class: Standard
- type: Fixed
- cost: $8.00
offer cyclevintagee:
- availability: In Stock
- options: Ship-to-home
- quantity: 1
- started: April 16, 2026
- sold: 0
payments cyclevintagee:
- wallet: Apple-pay
- credit card: Mastercard
- other
general cyclevintagee:
- condition: Used
- Parts Accessories > Motorcycle Scooter Parts Accessories > Other Motorcycle Scooter Parts Accessories
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