S&S Cycle - S&S Performance Parts 2025 L - Volume 67

1936-'84

www.sscycle.com

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

1 -2017-UP 2- 2007-'17 3 -1999-'06 4 -1984-'99 5 -1936-'84 6 -XL-RA1250 7 -BELTS & GASKETS 8 -TOOLS 9 -WARRANTY 10 -APPENDIX

• 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

• 74"–8:1 or 9:1 compression • 80"–8:1 or 9:1 compression

Replacement Rings for 74" Oversize

Forged 74" Pistons

Part #

Deck Height

Oversize

8:1 Compression

9:1 Compression

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

Standard (37/16")

Standard (37/16")

106-5495 (HD-22101-41, 22101-48) 106-5496 (HD-22103-48, 22103-41) 106-5497 (HD-22104-48, 22104-41 106-5498 (HD-22105-48, 22105-41

1 436"

106-5503

94-2201X (HD-22327-55B, 22357-48, 22357-41)

+010"

+010"

1 436"

106-5504

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

+020"

+020"

1 436"

106-5505

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

+030"

+030"

1 436"

106-5506

+040"

+040"

1 436"

—

106-5775

Forged 80" Pistons

Replacement Rings for 80" Oversize

Deck Height

Part #

Oversize

8:1 Compression

9:1 Compression

94-2206X (HD-22334-78A, 22334-78B, 21920-83)

Standard (31/2")

106-5511 106-5512 106-5513 106-5514

106-5519 106-5520 106-5521 106-5522

Standard (31/2")

1270"

94-2207X (HD-22335-78A, 22335-78B, 21922-83)

+010"

+010"

1270"

94-2208X (HD-22336-78B, 21923-83)

+020"

+020"

1270"

94-2209X (HD-22337-78B, 21924-83)

+030"

+030"

1270"

Replacement Wristpins and Keepers Description

S&S® Stock Bore Forged Piston Specifications Displacement

Part #

Piston Deck Height

Bore Stroke Compression Ratio

106-6123 94-9254-S

Wristpin 791" diameter

74" 80"

37/16"

331/32"

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

1436" 1270"

each

Wristpin keeper, c-clip

31/2"

41/4"

94-9254

4 pack

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

S&S will fit these pistons to your existing cylinders (when purchasing new cylinders, pistons can be fit to them as an option)

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

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