Piston Spring (Light Blue & Black) | AUC 2107

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Genuine SU piston spring — Light Blue & Black. Spring weight: light/stiff combination. The piston spring controls the rate at which the piston rises in response to airflow. Spring selection affects mixture richness and throttle response — choose the correct colour for your application. Manufactured by Burlen to original SU specification. Part Number: AUC 2107 Show more