Complete Engines & Rebuild Kits

Mk136 Black Edition Engine - Oil Cooled - 49 State - M8 Touring 310-1290

Mk136 Black Edition Engine - 550G Gear Drive - Oil Cooled - Race Only - M8 Touring 310-1289

S&S Cycle 129" Power Package Engine Performance Kit - Chain Drive - Oil Cooled - Non-Highlighted Fins - M8 310-1226

Large displacement, high flowing S&S heads, and gear driven 640 cam result in large horsepower increase over stock engine124 cubic inch displacement at 10.8:1 compression4-1/8" bore X 4-5/8" stroke1.671" diameter crankpin927" wristpinPiston cooling...

Large displacement, high flowing S&S heads, and gear driven 640 cam result in large horsepower increase over stock engine124 cubic inch displacement at 10.8:1 compression4-1/8" bore X 4-5/8" stroke1.671" diameter crankpin927" wristpinPiston cooling...

Huge Power increase over stock engine124 cubic inch displacement4 1/8" Bore4 5/8" Stroke640 Cam1.671" diameter Crankpin927" WristpinPiston Cooling JetsS&S Forged Pistons10.8:1 CompressionS&S 3 Piece FlywheelHVHP Oil PumpElectric Compression ReleasesS&S...

+30% increase in HP and torque over stockShort stroke for less vibration and longer engine lifeShorter than stock engine height for easy installationDoes not include carb or ignition; use stock or aftermarket carburetor and air cleanerHigh volume,...

+30% increase in HP and torque over stockShort stroke for less vibration and longer engine lifeShorter than stock engine height for easy installationDoes not include carb or ignition; use stock or aftermarket carburetor and air cleanerHigh volume,...

+30% increase in HP and torque over stockShort stroke for less vibration and longer engine lifeShorter than stock engine height for easy installationDoes not include carb or ignition; use stock or aftermarket carburetor and air cleanerHigh volume,...

For those who don’t want to go “big inch”, the S&S V80 engine provides a performance solutionWith the same displacement and physical dimensions as a stock Harley-Davidson® Evolution® engine, the V80 fits in a stock frame just like a stock engine, but...

Stock-height basic engine is direct bolt in replacement for aging 80" H-D Evolution enginesDoes not include carb or ignition; use stock or aftermarket carburetor and air cleaner508 camForged rocker arms585 valve springsFlat top cast pistonsS&S standard...

Stock-height basic engine is direct bolt in replacement for aging 80" H-D Evolution enginesDoes not include carb or ignition; use stock or aftermarket carburetor and air cleaner508 camForged rocker arms585 valve springsFlat top cast pistonsS&S standard...