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

1936-'84

www.sscycle.com

Fitment • 88", 93", 96", 98" and 103" engines for 1936–’84 OHV big twins • Features and benefits • Forged pistons for superior strength • Modern alloys and piston skirt profiles for low noise and long engine life • Dome volume 30cc • Piston kits include set of pistons, rings, wristpins, and clips Options • Available in 35/8" Standard + 010", 020", 030", and 060"oversizes S&S will fit these pistons to your existing cylinders (when purchasing new cylinders, pistons can be fit to them as an option)

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 88" 93" 96" 98" 103"

S&S® 35/8" Bore Forged Piston Application Chart

Cylinder Length SH-Series & P-Series Engines

Wristpin Deck Height

Flywheel Diameter

Displacement

Stroke

Compression Ratio

KN-Series Engines

1 260" 1 260" 1 260" 1 260" 1 260" 1 260"

41/4" 41/2" 41/2" 45/8" 43/4"

81/2" 81/2" 81/2" 81/2" 81/2" 81/4"

7 5:1 8 5:1 9 1:1 9 1:1 8 9:1 9 7:1

5 330" 5 405" 5 363" 5 440" 5 530" 5 630"

–

5 625"

93" HC

– – – –

5"

Forged 35/8" Bore Piston Sets For 1936 - ’84 OHV Big Twins Oversize Wristpin Deck Height Part # Standard (35/8") 1 260" 106-5535 +010" 1 260" 106-5536 +020" 1 260" 106-5537 +030" 1 260" 106-5538 +060" 1 260" 106-5789 Recommended Piston Fit Close: .003" - .0035" Loose: .004" - .005" Compression ratios will change when replacing existing pistons in S&S engines with this series of forged pistons If higher compression is desired, we suggest shortening cylinders, or decking heads to achieve the desired compression ratio A change of 060" will produce approximately 1 point of change in the compression ratio

Replacement Rings for Forged 35/8 Bore Pistons Oversize Part # Standard (35/8") 94-1220X +010" 94-1221X +020" 94-1222X +030" 94-1223X +060" 94-1226X Replacement Wristpins and Keepers Description Part # Wristpin 791" diameter 106-6123

each

94-9254-S

Wristpin keeper, c-clip

4 pack

94-9254

37/16"–Replacement Rings for Cast Piston Kits Oversize Part # +010" 940-0007 +020" 940-0008

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