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S&S Cycle 129 in. Big Bore Cylinder Kits

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The S&S Cycle 129 in. big bore cylinder kits for a Harley-Davidson® motorcycle provides a significant increase in engine displacement, leading to substantially more

The S&S Cycle 129 in. big bore cylinder kits for a Harley-Davidson® motorcycle provides a significant increase in engine displacement, leading to substantially more power and torque, especially in the low and mid-range, while still maintaining compatibility with the stock crankcases for a noticeable performance boost. These kits essentially, give your bike a "bigger punch" without requiring extensive structural changes. Big bore kits often provide a noticeable improvement in low-end torque, making the bike more responsive in everyday riding situations. Most 129 in. kits are designed to work with stock crankcases and

The S&S Cycle 129 in. big bore cylinder kits for a Harley-Davidson® motorcycle provides a significant increase in engine displacement, leading to substantially more power and torque, especially in the low and mid-range, while still maintaining compatibility with the stock crankcases for a noticeable performance boost. These kits essentially, give your bike a "bigger punch" without requiring extensive structural changes. Big bore kits often provide a noticeable improvement in low-end torque, making the bike more responsive in everyday riding situations. Most 129 in. kits are designed to work with stock crankcases and other engine components, simplifying installation. Many kits maintain the factory engine appearance with powdercoat finishes, giving the bike a subtle look that belies its enhanced performance. To fully optimize the performance gains from a big bore kit, additional tuning adjustments like adjusting the fuel injection system or changing the camshaft may be necessary. Each 129 in. big bore cylinder kit is tailored with the necessary components for your specific bike model. Select the kit that's designed specifically for your model and engine to ensure proper fitment.