About S&S Cycle
S&S Cycle has built American V-twin performance parts in Viola, Wisconsin since 1958 — flywheels, carburetors, cams, cylinder heads and complete crate engines. When a Harley owner talks about a 124, a 128 or a 131 build, they are usually talking about S&S. Few names carry more weight with engine builders in this space.
Unleash extreme power from your 120 cubic inch or larger Harley-Davidson Dyna with the S&S Cycle .675 inch Lift Easy Start Gear Drive Camshaft Set. Engineered for high-compression engines, this gear-driven design eliminates timing chain lash for precise valve timing, while the Easy Start technology allows your stock starter to handle the increased demands.
Why riders pick this
- Aggressive 0.675 inch valve lift for extreme performance
- Gear-driven for precise valve timing and no chain lash
- Easy Start technology retains stock starter functionality
- Optimized for 4500–6500 rpm power band
- Includes inner gears and complete installation kit
This camshaft set is built for serious performance, specifically targeting engines with a minimum 11:1 compression ratio. The impressive 0.675 inch valve lift dramatically improves cylinder filling and scavenging, translating to a substantial power increase in the upper RPM range. The gear-driven system ensures that every degree of valve timing is accurate, maximizing the potential of your high-performance V-twin.
Extreme Lift, Easy Start
- Substantial 0.675 inch valve lift for maximum airflow
- Gear-driven design eliminates timing chain lash for precision
- Easy Start profile works seamlessly with stock starter motors
- Optimized for 4500–6500 rpm power band
- Includes inner gears and full installation kit
Built for Big-Inch Builds
If you're running a big-inch Dyna motor, this cam set is designed to complement your build. The Easy Start feature is a critical advantage, saving you from having to purchase an expensive high-torque starter. Proper engine preparation, including correct compression and cylinder head work, is essential to fully utilize the potential of these high-lift camshafts. Always verify your engine's specifications before installation.
Specifications
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Brand: S&S Cycle
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Manufacturer Part #: 106-5741
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Lift: 0.675 inch
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Type: Gear-driven Easy Start
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Category: Engine Components / Camshafts
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Weight: 1 lb
Common questions
Can I use my stock starter with these high-lift cams?
Yes, absolutely. The S&S Cycle Easy Start profile is specifically engineered to allow your stock starter motor to crank the engine reliably, even with the significant 0.675 inch valve lift.
What compression ratio is required for these camshafts?
These camshafts require a minimum compression ratio of 11:1. Engines with lower compression may not fully benefit from the aggressive lift and could experience suboptimal performance.
Are these cams suitable for my 103 cubic inch Dyna?
This .675 inch lift cam set is designed for 120 cubic inch or larger engines. It is crucial to verify your engine's displacement and compression ratio to ensure proper compatibility and performance.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
