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

1984-'-99

www.sscycle.com

S&S® 35/8" Bore Cylinders With Pistons Kit Specification Chart

Stock Heads (Flat Topped Pistons)

S&S Super Stock® Heads (Domed Pistons)

Cylinder Length

Displacement

Stroke

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" 96" 103" 88" 96" 88" 96" 80" 89" 80"

Compression Ratio Standard

Compression Ratio

Intermediate

High

41/4" 45/8"

5 375" 5 565" 5 750"

9:1

9 4:1

10 1:1 10 9:1 11 8:1

12 3:1 13 2:1 14 2:1

9 75:1 10 5:1

10 1:1 10 9:1

5"*

Stock crankcases must be machined to accommodate the large spigot diameter of 35/8" bore cylinders

*Small Diameter Flywheels

35/8" Bore Cylinders With Pistons For 96" & 88" Kit For 1984-’99 Big Twins

Stock Heads (Flat Topped Pistons)

S&S Super Stock® Heads (Domed Pistons)

Cylinders w/Pistons

Cylinders w/Standard Compression Pistons

Displacement

Natural

Wrinkle Black

Natural

Wrinkle Black

91-7002 91-7202

91-7502 91-7702

91-7009 91-7207

–

91-7707

35/8" Bore Cylinders With Pistons For 96" & 88" Kit For 1984-’99 Big Twins

S&S Super Stock® Heads (Domed Pistons) Cylinders w/Intermediate Compression Pistons Natural

Displacement

Wrinkle Black

91-7052 91-7054

91-7552

– S&S ® 31/2" Bore Cylinders With Pistons Kit Specification Chart

Flat-Topped Pistons For Stock Or S&S Performance Replacement Cylinder Heads

Compression Ratio Stock Heads

Displacement

Piston Type

Stroke

Cylinder Length

S&S 76cc Performance Replacement Heads

Cast/Flat-topped Forged Flat-topped

41/4" 45/8"

5 550" (Stock) 5 550" (Stock)

8 5:1

8 8:1 9 4:1

9 25:1

Special Domed Pistons For S&S Super Stock ® Cylinder Heads For 1984-’99 Big Twins Displacement Piston Type Stroke Cylinder Length

Compression Ratio-S&S Super Stock® Heads

41/4" 45/8" 45/8"

5 550" (Stock) 5 550" (Stock) 5 550" (Stock)

10:1 10:1

89" LC 89" HC

Forged/Super Stock® Domed

12 5:1 31/2" Bore Cylinders With Pistons Kit For Stock Or S&S ® Performance Replacement Heads For 1984-’99 Big Twins Displacement Natural Wrinkle Black 80" 910-0179 (HD-16510-83A) 910-0182 (HD-16512-86A) 89" 91-7211 91-7711 31/2" Bore Cylinders With Pistons Kit For S&S ® Super Stock ® Heads For 1984-’99 Big Twins Displacement Natural Wrinkle Black 80" 91-7213 91-7713 89" LC – 91-7715

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