Electrec sound on hard acceleration
I fully realize that ebikes should probably be pedaled a bit from a dead stop before engaging the motor, otherwise the torque places a lot of strain on components. However, sometimes my thumb is quicker on the throttle than my feet are on the pedals, particularly at busy intersections. When this happens under load (e.g., uphill from a red light), my Electrec makes a brief, loud clunk/sproing (perhaps pop/sproing) sound from the rear. It sounds sort like the drive chain skipped teeth on a sprocket, though the close engagement of the chain makes that appear unlikely. Anyone else with an Electrec also get this noise sometimes? Any idea what it is and if I'm doing any damage when it happens? It's happened many times and there's no obvious damage. I can't reproduce the effect except on road, under load, up hill. I make sure the motor mount bolts are tight and the motor drive chain is fully engaged on the sprockets. I've had the rear wheel off a couple of times to change tires and I try to make sure everything is aligned and centered (not easy on the Electrec, changing the rear tire can take a few hours!), yet the problem persists. Naturally, I could avoid this by better training myself to pedal more before hitting the throttle, but I'd still like to know what's making that noise. Ideas?