- This camshaft IS also for 1954-1984 big twins with either the Hydraulic Conversion kit or the Cylinder Head Replacement kit for panhead engines
The S&S Cycle Part 33-5108 Big Twin 640 Camshaft is designed to enhance performance in Harley-Davidson big twin engines manufactured between 1984 and 1999. Compatible with a range of models including the Electra Glide, Heritage Softail, Fat Boy, Low Rider, and Springer Softail, this camshaft is engineered for riders seeking improved power and efficiency. Its design accommodates engines with compression ratios of 10.5:1 to 11.5:1, or smaller motors with compression ratios of 11:1 to 12:1, making it suitable for a variety of engine setups. This camshaft does not require as much compression as the 631 model, providing a balanced performance upgrade for most big twin engines. It is essential to note that this component is for hydraulic tappet configurations and requires spring spacing adjustments during installation. Additionally, the camshaft is compatible with 1954-1984 big twin models when used with either the Hydraulic Conversion kit or the Cylinder Head Replacement kit for Panhead engines, offering versatility for vintage Harley-Davidson restorations or upgrades. Constructed by S&S Cycle, a reputable name in powersports, this part offers reliable quality and performance. It is important to acknowledge that this product is not carb approved and requires carb acknowledgment prior to installation. Please consult your professional mechanic to ensure compatibility and proper installation, especially considering its non-carb approved status. This camshaft is ideal for serious riders and enthusiasts looking to optimize their Harley-Davidson big twin engines for increased horsepower and torque, whether for everyday riding or long-distance touring. The installation process involves precise adjustments due to its specific design, so professional expertise is recommended to achieve the best results. With its proven performance characteristics, the S&S Cycle 640 camshaft is a valuable upgrade for Harley-Davidson owners aiming to boost their motorcycle's engine capabilities. Trust in S&S Cycle's engineering for a durable, high-performance component tailored for your Harley-Davidson big twin motorcycle.
Features:
- Designed for Harley-Davidson big twin models from 1984 to 1999 for improved engine performance
- Compatible with engines featuring compression ratios of 10.5:1 to 11.5:1 or smaller motors with 11:1 to 12:1 ratios
- Suitable for hydraulic tappet configurations, requiring spring spacing adjustments during installation
- Also compatible with 1954-1984 big twin models when used with Hydraulic Conversion or Cylinder Head Replacement kits
- Manufactured by S&S Cycle, a trusted name in powersports performance parts
- Requires carb acknowledgment and is not carb approved, suitable for professional installation
- Optimizes horsepower and torque for touring and cruiser Harley-Davidson motorcycles
