Engines and Components Pistons and Piston Rings

S&S Cycle

S&S Cycle 36-84 BT 3-7/16in x Up To 4-3/4in Stroke LC Piston Set - .090in

$649.95

SKU: S0GE 920-0091

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INSTALL DIFFICULTY
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Moderate — 2–4 hours

Description

Part #: 920-0091

These 3-7/16" .090" bore, low compression stroker pistons are part of an S&S stock bore stroker kit for 1936-'84 HD (R) big twins, and are designed to be used in conjunction with S&S (R) stroker flywheels. Flywheels of the following strokes may be used for the following displacements: 4-1/2" stroke - 84" @ 7.3:1 compression, 4-5/8" stroke - 86" @ 8.0:1 compression, 4-3/4" stroke - 88" @ 9.0:1 compression.

MIA's Description

These low compression stroker pistons are designed for 1936-1984 Harley-Davidson Big Twins and are compatible with S&S stroker flywheels. They feature a 3-7/16" bore and come in a .090" oversize. Modern alloys and advanced skirt profiles ensure low engine noise and long engine life. The pistons can be used in stock Harley-Davidson cylinders, with specific considerations for 61" and 80" engines.

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Specifications

BrandS&S Cycle
Part NumberS0GE 920-0091

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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