Steve has a Batavus. There's only ONE clutch, a centrifugal one. The starting handle, which looks like a clutch handle but is ONLY used for starting, squeezes the clutch plates together to engage the engine while you pedal. It's the OPPOSITE of a motorcycle clutch lever. Squeezing it engages the engine and rear wheel, leaving it alone allows the action of the clutch to disengage the engine and rear wheel at low rpms, so you can idle at a stop, for instance.
Steve, if you've been pulling the clutch lever while it's running, thinking you're allowing the engine to turn freely, we may have found at least part of why it's not running right!