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Old 05-12-2015, 10:17 PM
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eschaider eschaider is offline
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Location: Gilroy, CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
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My bet would be the damping springs in the clutch disc hub. I suspect one or more are either broken or have fallen out. Without the springs to dampen the engagement process the disc winds up on the hub and slams into the remaining springs/stops producing the jerky shuddering you experience when attempting to start up from a stop smoothly.


Ed
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