In Stock
- All Items, Including Not In Stock (5) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Make/Model
Powersports Compression Ratio
- 11.10 to 1 (3) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 11.00 to 1 (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
In Stock

Selected Filters

Filters

Make/Model
Powersports Compression Ratio
- 11.10 to 1 (3) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 11.00 to 1 (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.

S&S Cycle 128 in. Power Packages with Chain Drive Cam

Not Yet Reviewed

S&S Cycle offers 128 in. power packages with chain drive cam for a variety of Harley-Davidson© street bikes from 2017 and up. Kit details include:

BIG BORE KIT:

S&S Cycle offers 128 in. power packages with chain drive cam for a variety of Harley-Davidson© street bikes from 2017 and up. Kit details include:

BIG BORE KIT:
* 4.250 in. bore
* Forged pistons
* 11.1:1 compression ratio

OIL PUMP/CAM PLATE:
* Precision-machined from billet aluminum
* Passage plugs removable for servicing
* Independent scavenge sections for flywheel cavity and cam chest
* Debris screens in both scavenge pickups
* Magnet in cam chest to help stop debris from entering oil pump
* Increased flow capacity on both feed and scavenge side
* Pressure relief valve is adjustable with unit installed in engine
* Kits now include updated oil pump with groove for optional OEM oil seal

PUSHRODS:
* Quickee pushrods with chrome covers

TAPPETS:
* Hand-assembled to exacting tolerances
* Reduced valvetrain noise from start-up to shut-down
* Close tolerances for low leak-down rates
* Fast pump-up and superior high-RPM performance

TAPPET CUFFS:
* Hard anodized black coating
* Billet aluminum construction
* Stronger than stock material eliminates distortion
* Improve tappet stability in high lift and high RPM situations

CAM:
* S&S 550 cam—designed for big bore applications
* Available in both chain drive and gear drive variations

VALVE SPRINGS:
* Work well with cams up to .605 lift
* High performance conical single-wire spring
* Includes top collars, keepers, and valve seals/bottom collars

CAM CHAIN TENSIONER:
* Precision-machined from billet aluminum
* Thicker shoe for longer wear
* Direct chain oiling
* Larger piston for more consistent pressure
* Tighter tolerances improve stability