@Hobo Mikey is right of course. But if you haven't done so yet, try setting the Peak Power to 100% at each Assist Level in Mission Control. That way the motor will continue to increase output as you pedal harder rather than leveling off at lower assist levels. The SL motor can give you up to ~2X your input to apx. 240W max. For example if you have Eco set to 30% Assist and 100% Peak, you can get 120W from the motor with a 200W effort (200W x 0.6 = 120W). A setting of 50% Assist & 100% Peak will provide 400W total. These should push you along pretty quickly on all but the steepest hills! Experiment with settings that work best for your trails.