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.
Optimize your Harley-Davidson Dyna with the S&S Cycle Big Twin Dyna Easy Start 640GE Camshaft. Engineered for precise operation and controlled idle characteristics, this gear drive camshaft ensures reliable performance for your V-twin.
Why riders pick this
640GE profile for controlled idle characteristics
Gear drive design ensures precise valve timing
Engineered for reliable performance
Specific to Dyna Easy models with gear drive
Enhances engine longevity and consistency
The 640GE camshaft is specifically designed for Dyna Easy models equipped with gear drive cam systems. Its gear-driven design eliminates timing chain lash, providing superior accuracy in valve timing and a more direct feel. This cam profile is crafted to deliver a smooth, controlled idle, making it a great choice for a performance upgrade that maintains streetability.
Precise Control and Reliability
Big Twin Dyna Easy Start 640GE profile for controlled idle
Gear drive design ensures precise valve timing
Engineered for reliable operation in gear drive setups
Specifically for Harley-Davidson Dyna Easy models
Upgrade with Confidence
When upgrading to a gear drive camshaft like the 640GE, you're investing in enhanced engine longevity and consistent performance. Due to the nature of camshaft installation, which involves engine disassembly and precise valve timing, professional installation is strongly recommended to ensure optimal results and prevent potential issues.
Specifications
Brand: S&S Cycle
Manufacturer Part #: 106-4849
Weight: 1 lb
Category: Engine Components / Camshafts
Common questions
What profile does this camshaft have?
This camshaft features the Big Twin Dyna Easy Start 640GE profile, which is specifically designed to provide controlled idle characteristics with the reliability of a gear drive system.
Will this fit my Twin Cam Dyna?
This S&S Cycle camshaft is specific to Dyna Easy gear drive models. Twin Cam Dyna models typically use a different cam profile and may not be compatible. It is crucial to verify your engine type and cam drive system before ordering.
Is professional installation required for this camshaft?
Camshaft installation involves engine disassembly and requires expertise in valve timing. For optimal performance and to ensure correct fitment, professional installation is strongly recommended.
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.
BRAND
S&S Cycle
TYPE
Camshafts
SKU
T14-663341
WEIGHT
1.0 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
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Jun 23, 2024
Keep it
I bought the T111 for my 1999 Road king. Installation was straight forward. for I had asked a Harley shop what would cost for install they quoted $ 2000.00 to much for me. I figured if Iam going to pay that kind of money for install i would buy a ride on lift and do it myself. The motor was worth the cost no issues so far would have liked to choose my own cam's I have 12000 miles on it. Had to upgrade swingarm bushing's and install grade 8 front motor mount bolts this motor has torque you are going to like it
S&S Cycle 640GE Easy Start Gear D...
$683.95
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