Stock replacement crank shaft assemblies come complete with rods and shaft fully assembled and balanced for stock cast pistons.

CRANK SHAFTS FOR BIG TWINS

CRANK SHAFTS FOR SPORTSTER

The S & S 89" stroker kit is designed with maximum potential engine life and performance in mind. Each component is engineered with the strongest possible construction available. Design features include:

• 4-5/8" stroke flywheels machined from heat-treated steel forgings, for strength
• Heavy duty connecting rods reinforced chrome moly steel
• S & S design sprocket shaft large diameter, keyed, 6 taper virtually eliminates the possibility of spinning
• Pinion shaft precision ground using the latest manufacturing technology
• Cast 9.25:1 compression pistons optimum power with unleaded gas

Available for Evolution® Big Twins 1984-up, each kit includes flywheel assembly with rods and shafts (balanced, trued, and ready to Install), +.005" oversized pistons with rings, wrist pins and retainers and instructions.

Engineered with the strongest possible materials and construction methods available. Available in 4-1/4" (stock) or 4-5/8" strokes, each S & S crank shaft is factory assembled and comes complete with heavy duty rods, pinion shaft and sprocket shaft fully assembled, ready to install. Flywheels only are also available for stock replacement.

These connecting rods have been designed as heavy duty replacements for stock or modified Harley Davidson® engines. Each set comes complete with crank pin,bearings, bearing retainers, nuts, and piston pin bushings. Ready to install.Design features include: Drop forged from 4140 chrome moly steel  Harder than stock heat treatment specifications Additional rod to rod clearance to accommodate strokes up to 5"  7.440" center to center length

FOR BIG TWINS

Ready to install, complete with crank pin, crank pin nuts, piston pin bushings and rod rollers with aluminum retainers.

JIMS Crank Pin Kits
These crank pins feature a 16 micron finish or better on the flywheel shafts and all diameters ground concentric to at least .0003". Each kit includes a precision American made 2- or 3-hole crank pin, two crank pin nuts and a woodruff key.

3-Hole Crank Pin Kits

MOTOR FACTORY® AMERICAN MADE ENGINE SHAFTS
These quality American made crank pins and flywheel shafts are made from a premium aerospace approved chromium nickel molybdenum alloy with state of the art computerized manufacturing equipment. This alloy is vacuum degassed to ensure meeting the magnetic particle standards of ASM2301 making it the most durable alloy available to insure long lasting performance. The crank pins feature a new oiling design, 180 degrees apart, for more complete lubrication on bearing diameter. Made in the USA.

Upper Rod Bushings

Connecting Rod Races
Complete set of three male and female races.

Crankcase Rollers for Big Twins
For the left case of OHV Big Twins1930 thru 1957 (24 used), and the right case 1958 thru 1986 (28 used). Also fit all early wheels.

Right Side Crankcase Rollers forSportster® and Big Twin Models
For 1957-1976 Sportster models and1955-1957 OHV Big Twins (13 used)