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01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 07-026 For Big Twin Models 235819 Fits 1941-early 1981, Jims USA (OEM 348-41 & 23961-41) 235820 Crank pin with special 180 degree oiling system for more complete lubrication on bearing diameter, fits 1941 thru early 1981 Big Twin models (OEM 23961-41) 235821 Crank pin, fits Big Twin models late 1981 thru 1999 (OEM 23961-80) For Sportster Models 235817 Crank pin, fits Sportster models 1954 thru early 1981 (OEM 23960-54) 235818 Crank pin, fits Sportster models late 1981 thru 1999 (OEM 23960-80A) JIMS AMERICAN MADE CRANK PINS The crank pin is the heart of your engine. Why take a chance, everything revolves around this component! For that reason Jim's Machining in the USA has spent three years developing the ultimate crank pins available. Made from aerospace quality alloy bar steel, made to perfection by Jim's. The pins offer excellent strength and toughness. They are ground to a 16 micron finish with a diamond grinding wheel then polished to a 6 micron finish. Available for Sportster and Big Twin models. Note: Late 1981 thru early 1983 models require 1"-20 TPI nuts (ZP N235827) Pinion gear and sprocket shaft nuts 235833 Pinion gear shaft Big Twin models late 1981 thru 1989, 3/4"-20 thread (OEM 24016-80) 711451 Fits pinion gear shaft Big Twin models late 1981 thru 1989, 3/4"-20 thread (OEM 24016-80), USA Made 231835 Fits pinion gear shaft on 1954 thru 1990 Sportster, dealer 5-pack (OEM 7913) 234680 Fits pinion gear shaft on 1991 to present Sportster and 1993 thru 1999 Big Twin (OEM 7916A) 235834 Fits sprocket shaft Big Twin models 1972 thru early 1985, 1 1/8"-16 thread, USA Made Crank pin nut sets 235826 Fits Sportster models from 1954 thru early 1981, 1"-20 thread (OEM 23967-54A), Jims 235823 Fits Sportster models late 1981 thru 1997 and Stroker motors 1954 thru early 1981, check for clearances, 1"-20 thread (OEM 23901-81), Jims 231565 Fits Big Twin models from 1954-early 1981. 1"-18 thread (OEM 23966-54A), USA Made 235827 Fits Big Twin models late 1983 thru 1999, 1"-20 thread (OEM 23969-83), USA Made NUTS FOR CRANK PINS, SPROCKET AND PINION SHAFTS These USA made nuts now give the ultimate in flywheel holding power. The mating face of each nut has been ground to a 32 surface finish and held square to threads within .0005". This in turn will pull the shafts straight into the flywheels and simplify flywheel turning. But it did not stop there, each nut is machined on state of the art CNC lathes and heat treated to make these nuts the toughest and the best available on the market today. READY TO INSTALL STOCK REPLACEMENT CRANKSHAFTS FOR TWIN CAM These ready to install flywheel and connecting rod assemblies are made, assembled and balanced by S&S. They are highly recommended for performance applications, but are an excellent replacement for use in stock engines as well. Flywheels are fully rebuildable and made of forged steel and have pressed-in shafts. They feature a 1 1/2" or 1.671" diameter crankpin and the connecting rods have, unlike stock flywheel assemblies, replaceable bearing races. Crank shafts for 1999-2006 models have a stock, 4" stroke. Crankshafts for 2007 to present 96, 103 and 110CI models have a stock, 4 3/8" stroke. 4 5/8" Stroker flywheels for custom-build High Performance motors 788974 Complete flywheel assembly with tapered piston wrist pin ends and balancer gear installed 788980 Complete flywheel assembly with tapered piston wrist pin ends, without balancer gear 788977 Complete flywheel assembly with full width piston wrist pin ends and balancer gear installed 788983 Complete flywheel assembly with full width piston wrist pin ends, without balancer gear Fits 114CI and 117CI Milwaukee Eight engines 2017 to present, 4 1/2" stock stroke 788973 Complete flywheel assembly with tapered piston wrist pin ends and balancer gear installed (OEM 2410004 5A) 788979 Complete flywheel assembly with tapered piston wrist pin ends, without balancer gear 788976 Complete flywheel assembly with full width piston wrist pin ends and balancer gear installed 788982 Complete flywheel assembly with full width piston wrist pin ends, without balancer gear Fits 107CI Milwaukee Eight engines 2017 to present, 4 3/8" stock stroke 788972 Complete flywheel assembly with tapered piston wrist pin ends and balancer gear installed (OEM 2410005 7A) 788978 Complete flywheel assembly with tapered piston wrist pin ends, without balancer gear 788975 Complete flywheel assembly with full width piston wrist pin ends and balancer gear installed 788981 Complete flywheel assembly with full width piston wrist pin ends, without balancer gear S&S HIGHPERFORMANCE MILWAUKEE EIGHT 3PIECE FLYWHEEL ASSEMBLIES The crankshaft is the heart of any performance engine and S&S has been perfecting the art for over six decades. Stronger, more durable, and trued to a spec others can only dream of, these crankshaft assemblies for the Milwaukee Eight are the best of the best to build your high performance engine around. Made out of heat treaded 4140 material, harder andmore than twice as strongas stock.The stronger assembly eliminates the need to weld the crankpin. The High Strength connecting rods are designed with Finite Element Analysis to eliminate weak spots and handle more power. Consistent balance and precision machining makes them capable of higher RPM and perfect for gear drive cams. Crankshafts that have connecting rods with tapered piston wrist pin ends can be used with stock or S&S pistons. The full-width version can only be used with S&S pistons and S&S Big Bore cylinder kits. Crankshafts with 4 5/8" stroke can only be used with pistons that are designed for this stroke. 4 5/8" stroke gives: - 113CI from a 107CI engine with stock 3 15/16" bore- 117CI from a 114CI engine with stock 4 1/64" bore- 121CI from a 117CI engine with stock 4 5/64" bore- 131CI with an S&S 4 1/4" Big Bore kit E�G�N� CRANKSHAFT PARTS