need help! i have a 1994 vulcan 750. bike kept in good shape, always garage kept, only 13000 miles, never wrecked. runs rough. feels like ignition problem. when idling, i can hear the engine miss and can hear it in through the exhaust. when riding it, i can feel a power loss. if i try to give it more than a quarter turn on the throttle it bogs down and wont accelerate. the carbs were rebuilt 2 years ago, the ignition coils, wires, and plugs have all been changed. none of that was any help. still runs the same. any ideas? thanks cknnk