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S&S Cycle MK136 Black Edition Engines
S&S Cycle 17-23 Oil-Cooled M8 Touring MK136 Black Edition Engine
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Estimated Ship Date: Dec 14, 2026
Overview
Brand:
Manufacturer's Part Number:
310-1290
Part Type:
Product Line:
Summit Racing Part Number:
SSY-310-1290
Assembled:
Yes
Powersports Engine Family:
Milwaukee 8
Powersports Engine CID:
136
Engine Color:
Black wrinkle
Cylinder Heads Included:
Yes
Intake Manifold Included:
No
Carburetor Included:
No
Throttle Body Included:
No
Air Cleaner Included:
No
Rocker Box Cover Included:
Yes
Rocker Box Finish:
Black powdercoated
Spark Plugs Included:
Yes
Spark Plug Wires Included:
No
Ignition Included:
No
Computer Included:
No
Quantity:
Sold individually.
Notes:
Engine is for use with oil cooled touring models.
S&S Cycle MK136 Black Edition Engines
S&S Cycle offers MK136 Black Edition engines for a variety of Harley-Davidson© oil-cooled street bikes from 2017 and up. Details include:
CYLINDER HEADS:
* High-flow cylinder heads with premium seats, guides, valves, springs, and seals
* +1mm oversized intake and exhaust valves
* Valves are .030 in. longer than stock for improved valvetrain geometry
* .605" max lift valve springs
* High-strength alloy used in cylinder head casting, improved strength at high temperatures
* Enlarged cooling passage around the exhaust seats
* S&S Exclusive breather boxes
CRANKCASE:
* All premium quality components
* Patented dual-spray piston cooling jets
* Precision-machined oil scraper
* Enlarged oil sump
* Contoured floor allows oil to easily drain back to the sump
MK136:
* Forged pistons
* S&S performance oil pump and cam support plate
* Premium tappets and tappet cuffs
* Billet aluminum covers
* Sprocket shaft spacer included
* Champion spark plugs
* Retains stock engine height
* Includes cam cover badge
* Powdercoat finish matches factory finish
* Huge displacement increase means a huge power increase
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