S&S, zestaw kutego tłoka o średnicy 3-5/8″. +.020″

Fits all 3-5/8″ big bore 36-84 B.T. models with 4-1/4″ to 5″ stroke flywheels with the correct flywheel diameter of 8-1/2. Note that 4-3/4″ & 5″ strokes require 8-1/4 small diameter flywheels; all in combination with the appropriate cylinder length like mentioned below. Advanced alloy and piston skirt profile is used for low noise and long engine life. Piston dome volume 30cc; piston deck height 1.260″. 88″ (4-1/4″ stroke; 8-1/2″ flywheel dia.; 8.5:1 CR; 5.330″ cyl. length). 93″ (4-1/2″ stroke; 8-1/2″ flywheel dia.; 8.5:1 CR; 5.405″ cyl. length). 93″ HC (4-1/2″ stroke; 8-1/2″ flywheel dia.; 9.1:1 CR; 5.363″ cyl. length). 96″ (4-5/8″ stroke; 8-1/2″ flywheel dia.; 9.1:1 CR; 5.440″ cyl.length). 98″ (4-3/4″ stroke; 8-1/4″ flywheel dia.; 8.9:1 CR; 5.530″ cyl. length). 103″ (5″ stroke; 8-1/4″ flywheel dia.; 9.7:1; 5.630″ cylinder length). Pistons include wrist pins; wrist pin clips and piston rings. Note: For a higher compression ratio S&S advises shortening the cylinders. Shortening cyl. .060″ will produce approx. 1 point increase in CR. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.