Three kits bought (250W, 500W, 750W) — repeated faults, wasted time, and latest 750W motor issue ignored
In January 2026, I purchased three separate Varstrom kits: a 250W, a 500W and a 750W. What should have been a straightforward purchase has turned into repeated faults, repeated delays and repeated disappointment. The problems have not been limited to one item. We have had: 1. a battery fault where the switch did not properly isolate power, 2. a throttle fault that stuck ON and later failed with Error 4, 3. long delays and a lot of chasing to get replacement parts sent out. Now the latest issue concerns the 750W TSDZ8 kit. On the first outing since the throttle replacement, the motor made a loud creaking noise while pedalling and then started slipping under load when climbing, even in a low gear. It sounded like the gears/cogs were grinding. That is plainly not normal behaviour for a new or replacement motor. This latest 750W motor fault has been reported, and so far it has simply been ignored. At this point, this no longer looks like bad luck or a one-off issue. It looks like a pattern: faulty products, poor reliability, and after-sales support that is slow, reactive and ultimately ineffective. We bought three kits in good faith and have spent far too much time dealing with faults instead of actually using the bikes. I will update this review if Varstrom finally deal with the 750W motor issue properly. As things stand, based on my experience across all three kits, I would strongly advise others to think very carefully before buying.