Recently, I've bought an ebike that is about 2 months old now, I've maybe gotten 100-150 miles off of it as a daily commuter. When I pedal, it would have a lot of opposing force or friction, and pedaling harder doesn't make a difference. I've kind of deduced that the issue was purely mechanical and the hub motor had nothing to do with it since when I turned the bike off, it would do the same thing.
So essentially what happens is, it alternates, 90% of the time it would be hard to pedal and the rest of the time it operates seemingly normal. I had taken my chain off the derailleur and the problem persists. I thought maybe lack of lubrication in that tube in the bottom axle bracket of the bike that connects the pedal crank arms?
Some more details about my bike, it is a single speed, hub motor bicycle. I disconnected my brake sensors to use a road bike handlebar so I'm not sure how this factors into it. Please, anyone give your suggestions or thoughts, and thank you.
Bike has rim brakes, not disc brakes