S&S Cycle

REPLACEMENT PISTON RINGS FOR UL CYLINDERS REPLACEMENT RINGS FOR CAST PISTON KITS Oversize Part #

940-0006

Standard (37/16")

940-0007

+.010"

940-0008

+.020"

940-0009

+.030"

940-0010

+.040"

940-0011

+.060"

REPLACEMENT FORGED STROKER PISTONS FOR 1972–’85 HARLEY-DAVIDSON ® IRONHEAD SPORTSTER ®

FEATURES AND BENEFITS • 33⁄16" 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 Harley-Davidson® Sportster® models to 1200cc (74") displacement. • Can also be used to replace pistons in older S&S stroker engines with 41⁄16", 49⁄16", 41⁄2", and 413⁄16" 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. • Piston kits include rings and keeper buttons.

106-5544

STROKER PISTONS SPECIFICATIONS FOR 1972–'85 HARLEY-DAVIDSON® IRONHEAD SPORTSTER® MODELS Displacement 71" 72" 73" 74"

77" * 413⁄16" 5.330"

Stroke

47⁄16"

41⁄2"

49⁄16"

45⁄8"

Cylinder Length

5.330"

5.330"

5.330"

5.330"

Compression

7.5:1

8:1

8.5:1

9:1

9:1

*Requires 1⁄8" base plates and small diameter flywheels.

STROKER PISTONS KITS FOR 1972–'85 HARLEY-DAVIDSON® IRONHEAD SPORTSTER® MODELS Oversize Deck Height Part # +.010 .806" 106-5542 +.020 .806" 106-5543 +.030 .806" 106-5544 +.060 .806" 106-5791 Recommended Piston Fit: Close: .0030"-.0035" Loose: .0045"-.0055" REPLACEMENT MOLY FACED RINGS FOR 1972–'85 HARLEY-DAVIDSON® IRONHEAD SPORTSTER® MODELS Oversize Part # +.010 94-3201X +.020 94-3202X +.030 94-3203X +.040 94-3204X +.060 94-3206X

REPLACEMENT WRISTPINS AND BUTTONS Description Part # Wristpin .791" diameter 94-9350 Keeper Buttons 4 pack 94-9351

NOTE: If replacing the pistons in a older 77" stroker engine, stroker plates are required, and all clearances must be checked.

146 S&S Vintage 1926–1999 Order 608-627-1497