This S&S 124 cubic inch V124 engine fits 1984-'99 carbureted HD big twins • Large displacement, high flowing S&S heads, and gear driven 640 cam result in large horsepower increase over stock engine • 124 cubic inch displacement at 10.8:1 compression • 4-1/8" bore X 4-5/8" stroke • 1.671" diameter crankpin • .927" wristpin • Piston cooling jets • Large fin pack – heads and cylinders • Press together crankshaft • HVHP oil pump • Electric compression release – easy starting under any circumstance • S&S Super G carburetor with slotted "Slasher" air cleaner cover • Polished Aluminum finish • Chrome gearcover, tappet covers, and rocker covers • Two year warranty