Page 375 of High Performance Parts for American V-Twins 2008 by S&S Cycle

1958-2008 50th ann iversary s&s® 92-3700 series 33/16 bore stroker pistons for 1972 85 sportster® models the 92-3700 series 3 3/16 bore stroker pistons are designed to be used in conjunction with s&s 45/8 stroke flywheels to convert 1000cc ironhead engines in 1972 85 harleydavidson® sportster® models to 1200cc 74 displacement the 92-3700 series pistons can also be used to replace pistons in older stroker engines with 41/16 49/16 41/2 and 4 13/16 stroke flywheels all clearances must be checked see chart below for displacements and compression ratios these pistons are normally used in stock harley-davidson® cylinders no cylinders are available from s&s for ironhead sportster models 92-3700 series piston 92-3700 series stroker pistons for 1972 85 harley-davidson® sportster® models displacement stroke cylinder length compression piston kits piston type 010 020 030 040 050 060 070 080 piston deck height 71 47/16 5.330 7.5:1 forged 92-3701 92-3702 92-3703 92-3704 92-3705 92-3706 92-3707 92-3708 .806 72 41/2 5.330 8:1 forged 92-3701 92-3702 92-3703 92-3704 92-3705 92-3706 92-3707 92-3708 .806 73 49/16 5.330 8.5:1 forged 92-3701 92-3702 92-3703 92-3704 92-3705 92-3706 92-3707 92-3708 .806 74 45/8 5.330 9:1 forged 92-3701 92-3702 92-3703 92-3704 92-3705 92-3706 92-3707 92-3708 .806 77 413/16 5.330 9:1 forged 92-3701 92-3702 92-3703 92-3704 92-3705 92-3706 92-3707 92-3708 .806 rings moly 94-3201x 94-3202x 94-3203x 94-3204x 94-3205x 94-3206x 94-3207x 94-3208x forged pistons recommended piston fit close .0030 0035 loose .0045 0055 wristpin 94-9350 94-9350 94-9350 94-9350 94-9350 94-9350 94-9350 94-9350 keeper buttons 94-9351 94-9351 94-9351 94-9351 94-9351 94-9351 94-9351 94-9351 requires 1/8 base plates and small diameter flywheels s&s pistons rings wristpin clips part no msrp 92-3700 series pistons $249.95 94-3201x series rings $23.45 94-9350 wristpin $12.95 94-9351 keeper buttons $17.95 order toll free 866-244-2673 8-92

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