S&S Cycle

1984–'99 big twins

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

CONTINUED CYLINDER & PISTON KITS

S&S® 31/2" BORE CYLINDERS WITH PISTONS KIT SPECIFICATION CHART

COMPRESSION RATIO

Displacement

Piston Type

Stroke

Cylinder Length

Stock Heads

S&S 76cc Performance Replacement Heads

S&S Super Stock® Heads

FLAT-TOPPED PISTONS FOR STOCK OR S&S PERFORMANCE REPLACEMENT CYLINDER HEADS 80" Cast/Flat-topped 41/4" 5.550" (Stock) 8.5:1

8.8:1 9.4:1

– –

89"

Forged Flat-topped

45/8"

5.550" (Stock)

9.25:1

SPECIAL DOMED PISTONS FOR S&S SUPER STOCK® CYLINDER HEADS 80" Forged/Super Stock® Domed 41/4" 5.550" (Stock)

– – –

– – –

10:1 10:1

89" LC

Forged/Super Stock® Domed 45/8" Forged/Super Stock® Domed 45/8"

5.550" (Stock) 5.550" (Stock)

89" HC

12.5:1

31/2" BORE CYLINDERS WITH PISTONS KIT FOR STOCK HEADS, S&S PERFORMANCE REPLACEMENT HEADS AND S&S SUPER STOCK® HEADS

Cylinders w/Pistons for S&S Super Stock® Heads

Cylinders w/Pistons for Stock Heads and S&S Performance Replacement Heads

Displacement

Natural

Wrinkle Black

Natural

Wrinkle Black

910-0182 16512-86A

910-0179 16510-83A

91-7213

91-7713

80"

– –

–

91-7211

91-7711

89"

91-7715

–

–

89" LC

ALL OTHER BORES AND FINISHES ARE AVAILABLE THROUGH SPECIAL ORDER

91-7504*

*Special Order: Download the Special Order Form at sscycle.com/soforms

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

PISTON REPLACEMENT PARTS: SEE PAGE 44

91-7715

All reference to HD® Part #s is for identification purposes only. We in no way are implying that any of S&S® Cycle’s products are original equipment parts or that they are equivalent to the corresponding HD Part # shown.

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