Page 243 of High Performance Parts for American V-Twins 2008 by S&S Cycle

1958-2008 50th ann iversary s&s® replacement flywheels for 1957 03 sportster® and buell® models sportster motorcycles were some of the first that s&s built stroker flywheels for in the early 1960 s today s&s offers flywheels for applications ranging from the stock 900cc ironhead to big inch s&s engines for harley-davidson® sportster® and buell® models although in the past s&s has offered flywheels machined to accept stock sprocket shafts we no longer offer these flywheels s&s flywheels are only available machined for s&s special design sprocket shafts late style stock flywheels do not have removable mainshafts so s&s special design sprocket shafts and pinion shafts must be used see mainshaft information below mainshaft designs in s&s flywheels for sportster models the s&s design left flywheel for 1957 85 sportster models has a special keyed 6° large diameter taper the larger 6° taper provides more contact area for increased gripping power and strength and makes for easier truing during assembly see photos the large sprocket shaft key helps prevent the sprocket shaft from spinning in the taper under extreme loads these flywheels will accept stock or s&s design pinion shafts s&s flywheels for 1986-up sportster and buell models feature large taper sprocket shaft and a large taper pinion shaft since the stock flywheels for these engines do not have removable mainshafts s&s engineers designed the pinion shaft with the same larger stronger taper as the sprocket shaft s&s flywheels in stock s&s flywheels machined for special s&s mainshafts for the following year groups are always in stock 1957-early `81 late 1981 85 1986 03 note s&s flywheels machined for stock mainshafts are no longer available stock design 1957 81 harley-davidson® sportster® models notes s&s design for 1957 03 sportster® models s&s flywheels must be used with the style of sprocket shaft that they were machined to accept you can determine the style of s&s flywheels you have by cross referencing the identification numbers stamped on the rim of your flywheels with the s&s flywheel identification code reference chart in this section of the catalog s&s flywheels machined for stock mainshafts are no longer available and stankos sim ply filled a ne product it w ed with a go as one of the od oldest and mos ideas in amer t respected ican business supplying a go at a fair price od product s&s also subscr ibed to anothe idea quality r business back in the days when yo and raced the u rode same machine reliability was ingredient and a key quality was to become a trad all subsequent emark of s&s equipmen t historical f act smith order toll free 866-244-2673 7-34

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