S&S Cycle

1926–'84 vintage engines

1984–1999 Evolution ® 1926–1984 Vintage Engines Tools & Shop Supplies Warranty & Company Policy Appendix & Index

FORGED PISTON KITS FOR 74" AND 80" 1936–’84 OHV ENGINES

106-5495

FITMENT • 74" pistons fit 1936–’78, 74" OHV engines • 80" pistons fit 1979–’84, 80" big twin engines and may be used in mild stroker engines with 41/4" stroke flywheels FEATURES AND BENEFITS • Forged pistons for superior strength • Modern alloys and piston skirt profiles for low noise and long engine life • Dome volume

• 74 LC = 46cc • 74 HC = 57cc • 80 LC = 41cc • 80 HC = 53cc • Piston kits include set of pistons, rings, wristpins, and clips OPTIONS

106-5511

S&S® STOCK BORE FORGED PISTON SPECIFICATIONS Displacement

• 74"–8:1 or 9:1 compression • 80"–8:1 or 9:1 compression S&S will fit these pistons to your existing cylinders (when purchasing new cylinders, pistons can be fit to them as an option)

Bore Stroke Compression Ratio Piston Deck Height

74" 80"

37/16"

331/32"

8:1 and 9:1 8:1 and 9:1

1.436" 1.270"

31/2"

41/4"

Recommended Piston Fit Close: .003" - .0035" Loose: .004" - .005"

REPLACEMENT RINGS FOR 74" Oversize Part #

FORGED 74" PISTONS Oversize

Deck Height 8:1 Compression

9:1 Compression

106-5495 22101-41, 22101-48 106-5496 22103-48, 22103-41 106-5497 22104-48, 22104-41 106-5498 22105-48, 22105-41 106-5773 22106-48, 22106-41

94-2200X 22325-55B, 22355-53, 22355-48, 22355-41

106-5503

Standard (37/16")

1.436"

Standard (37/16")

94-2201X 22327-55B, 22357-48, 22357-41

106-5504

+.010"

1.436"

+.010"

94-2202X 22328-55B, 22358-53, 22358-48, 22358-41

106-5505

+.020"

1.436"

+.020"

94-2203X 22329-55B, 22359-48, 22359-41 94-2204X 22330-55B, 22360-48, 22360-41

106-5506

+.030"

1.436"

+.030"

106-5775

+.040"

1.436"

+.040"

FORGED 80" PISTONS Oversize

REPLACEMENT RINGS FOR 80" Oversize Part #

Deck Height 8:1 Compression

9:1 Compression

94-2206X 22334-78A, 22334-78B, 21920-83 94-2207X 22335-78A, 22335-78B, 21922-83

106-5511

106-5519

Standard (31/2")

Standard (31/2")

1.270"

106-5512

106-5520

+.010"

1.270"

+.010"

94-2208X 22336-78B, 21923-83 94-2209X 22337-78B, 21924-83

106-5513

106-5521

+.020"

+.020"

1.270"

106-5514

106-5522

+.030"

+.030"

1.270"

REPLACEMENT WRISTPINS AND KEEPERS Description Part # Wristpin .791" diameter 106-6123

NOTES: Since many older motorcycles have been modified, be sure to confirm that your engine is still stock before ordering replacement pistons. Using 80" pistons with 74" (331/32" stroke) flywheels will result in very low compression and poor performance. Using 74" pistons with 80" (41/4" stroke) flywheels will result in contact between piston and cylinder head, and potential engine damage.

94-9254-S

each

Wristpin keeper, c-clip

94-9254

4 pack

143