S&S
S&S, M8 4-3/8" stroke flywheel assembly
S&S, M8 4-3/8" stroke flywheel assembly
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- With full wristpin width connecting rods for use with S&S pistons - With installed balancer gear - Comes fully assembled with flywheels; connecting rods; connecting rod bearings; pinion and sprocket shaft - 4-3/8" Stroke (107 or 124ci) - Heat Treated 4140 Material is harder & more than twice as strong as stock - Stronger assembly eliminates need to weld crankpin - S&S High Strength Connecting Rods are designed with Finite Element Analysis to eliminate weak spots - Balanced for S&S Performance piston weight (1213g) - Perfect for Gear Drive Cams - Consistent balance & precision machining - Capable of higher RPM for more available power!
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Why buy from Forty5°
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Verified compatibility
Every part we ship is checked against your bike's platform, year, and engine. If it doesn't fit, we tell you before you check out.
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Workshop installation
Book a serviceHave us fit it. Book installation at parts intake — same-day on most jobs, master techs only.
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Founder-led aftersales
Get in touchQuestions after fitment? You'll speak to the people who installed it. We answer email and WhatsApp seven days a week.