Page 612 of High Performance Parts for American V-Twins 2008 by S&S Cycle

race components flywheels s&s® racing flywheels for racing applications where extra strength and rigidity are essential s&s offers racing flywheels which are machined from special hardened forgings in addition to being harder the forgings have a heavier counter balance which makes it easier to balance flywheels to big bore pistons and heavy connecting rods often used in racing applications s&s racing flywheels are available for many different applications and feature a large number of options due to their custom nature s&s racing flywheels are special order items and a special order sheet must be filled out before an order can be entered special order sheets will be mailed or faxed on request or they may be downloaded in pdf format from our website at www.sscycle.com flywheels for big twin s&s racing engines s&s racing flywheels for big twin engines are designed for engines which are built with big twin crankcases this includes four cam style big twin cases from delkron mcclure and nungesser flywheel stroke can be specified between 3.500 and 5.250 although the very short strokes may not be possible with some configurations flywheel diameter can be specified between 8.000 and 8.500 flywheels can be machined for 1.250 or 1.500 diameter crankpins in tapered or pressed in styles sprocket shafts are available in stock or 1.500 diameters s&s offers two styles of pressed in crankpins one style is pressed into the drive side flywheel only and fits into a taper on the camside flywheel the other type is pressed into both flywheels please note that tapered 1.500 diameter crankpins and sprocket shafts can not be used with very short strokes appropriate connecting rods and mainshafts may be selected when flywheels are ordered refer to current special order sheet for options available s&s racing flywheels with pressed-in and welded style crankpin machined area around crankpin represents the rod clearance option for aluminum connecting rods with large cross section areas flywheels for big twin s&s racing engines msrp $549.95 32-2018 pictured below s&s pn 34-2170 ­ special 1.500 diameter press-in and welded crankpin is pressed and welded into the driveside flywheel only and fits into a taper in the camside flywheel pictured left s&s pn 34-2175 ­ special 1.500 press-in crankpin 34-2175 is pressed into both flywheels used in s&s flywheels for harley-davidson® twin cam 88® s&s 41/8 bore engines and pro stock engines steel end plugs included 16-27 visit us at www.sscycle.com

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