My wife's Freego Light folding bike has developed a fault the pedals seem to want to turn and the bike lurches forward even when it is just being pushed but with power on. We took it to a bike repair shop who sepnt a long time looking at it but were not able to fix it. They changed the twist control on the handlerbars but the problem persisted. They suggested it may be the controller but it would be difficult to find. We are going to try and find another repairer locally but I would also appreciate and help and advice from the community.
many thanks
That's a very common problem that any competent bike shop should be able to idetify and fix. You haven't been maintaining your freewheel, so it's got dirt in and behind it, and the freewheel has become a bit sticky because of lack of lubrication. When you push the bike, the freewheel is not freewheeling. Instead, it turns the chain and pedals, which operates the pedal assist.
The solution is to clean the freewheel, particularly behind it, where all sorts of crap gets jammed. When that's done, lay the bike on its left side and drizzle some oil into the gap around the axle immediately behind the drop-out. Run the pedals backwards a few times, then add a bit more oil and repeat. that should sort it out.
