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.
Unlock the true potential of your 2017 and newer Harley-Davidson Milwaukee-Eight engine with the S&S Cycle 68mm Throttle Body. This direct bolt-in replacement for the factory by-wire assembly significantly improves air intake flow. Experience sharper throttle response and enhanced engine performance on your M8-powered machine.
Why riders pick this
68mm bore diameter for maximum airflow
Direct bolt-in replacement for stock M8 throttle
Enhances throttle response and engine performance
Designed for 2017+ Harley Milwaukee-Eight engines
The S&S Cycle 68mm Throttle Body is a critical upgrade for any Milwaukee-Eight rider looking to maximize their engine's breathing and power output. By increasing the bore diameter over the stock unit, this throttle body allows a greater volume of air to enter the engine, creating a more potent air-fuel mixture. This translates directly into improved acceleration and a more aggressive feel from your M8 bagger or Softail.
Enhanced Airflow for M8 Performance
Larger 68mm bore diameter for increased air intake volume
Direct bolt-in replacement for factory by-wire throttle assemblies
Specifically designed for 2017+ Harley Milwaukee-Eight engines
Improves throttle response and overall engine performance
Seamless Integration and Power Potential
Designed for straightforward installation, this S&S Cycle 68mm Throttle Body integrates seamlessly with your Milwaukee-Eight's electronic throttle control system. While it's a direct replacement, pairing this upgrade with a performance air cleaner and a proper dyno tune will allow you to fully realize the power gains. It's an essential component for riders building a high-performance M8 engine, offering a solid foundation for further modifications.
Specifications
Brand: S&S Cycle
Manufacturer Part #: 170-0543
Bore Diameter: 68mm
Weight: 5 lb
Category: Engine Components / Throttle Bodies
Common questions
Will this throttle body fit my pre-2017 Harley-Davidson?
No, this S&S Cycle 68mm Throttle Body is specifically designed for 2017 and newer Harley-Davidson Milwaukee-Eight engines that use the factory by-wire throttle assembly. Twin Cam models require a different throttle body.
Do I need to tune my bike after installing this throttle body?
While it's a direct replacement, fuel mapping adjustments are highly recommended to optimize performance with the larger bore. Consult with a qualified tuner or ECM programmer for the best results.
Is this a complicated installation?
This S&S Cycle throttle body is designed as a direct bolt-in replacement for your stock M8 by-wire throttle. Basic mechanical knowledge and tools are generally sufficient for installation.
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
Throttle Bodies
SKU
T14-661678
WEIGHT
5.0 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
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Nov 25, 2024
Not at all worth it
Bought this for my 2003 ultra classic...s&s 97" big bore kit, s&s 510 cam, s&s 2-1 sidewinder, and ness big sucker. After countless attempts with different maps and 800 plus miles, bike still runs poorly, dies at stops and cannot idle properly, I know this may have worked for a lot of people, for myself, it has not worked at all it's the same as a v&h fuelpak. Bike overheats and throttle response is terrible. We've even swapped out parts and it always did the same thing. Put my old tuner on and bike starts, idles, and runs perfectly.
S&S Cycle 68mm Throttle Body - Ha...
$754.95
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