World's Largest Aftermarket Motorcycle Parts and Accessories Superstore!


S&S Cycle Replacement Piston Kit

Product may vary from photo(s).

Everyday Low Price: $321.99

Gold Club Price: What's This? The Gold Club is our premier membership program. For most items members receive 10% off every day, plus exclusive sales and benefits just for members. More Info Add to Cart to View Price

J&P Part: 431-866

This item qualifies for free ground shipping

– Order in the next to ship today.


S&S Cycle Replacement Piston Kit

Fitment Note: Fits S&S 100" and 107" motors with 4" bore.

• S&S pistons are designed with maximum piston/engine life and performance in mind

• Features include offset wrist pin to reduce piston slap and noise

• Piston-to-piston clearance at the bottom of the stroke is concentrated in the rear piston so a longer piston skirt can be maintained on the most critical area - the rear of both pistons

• Forged pistons for 1936-99 Big Twins with stock, longer 3-5/8″ big bore cylinders, strokes from 3-31/32″ (stock 74″) to 4-3/4″ and 4-5/8″ stroke S&S Sidewinders

• Each piston includes rings, wrist pin and wrist pin keepers

Made In The USA This product was proudly made in the USA

Important Product Notes

Product Specs

Cylinder Bore Size: 4″ bore

Dimension Oversize: +.020″

Manufacturer Part Number: 92-1402

Material Processing Method: Forged

Piston Bore Size: 3-5/8″

Sold in Units: Pair

Style: Flat Top


Fitment Note: Fits S&S 100" and 107" motors with 4" bore.

Live Help

Get Help From Our Industry Experts

Call Us 24/7 1-800-318-4823

Help / FAQs