I weigh 230 lbs, and I use this as a commuter bike to work with 20lbs of clothing, helmet, and backpack. I've done 55 with it and was scared for my life! Someone spoke of the extra weight vs the 3000 kit (9kg vs 4 kg). I understand that reasoning, but I can tell you it doesn't matter. This thing can wheelie. Wow, at 7500W I wonder how long your drive train will last
The biggest problem has been matching battery strength to controller current draw. I'm looking up now whether I can reprogram the kit controller (lunacycle.com rates this controller at 120 max amps!)
https://lunacycle.com/cyclone-XL-7500w-ebike-middrive/
I don't think I can reprogram it. Live and learn-I should have checked the controller max amps to match the battery, but even if I did, this controller/motor combo is so strong I doubt I could find a sellable battery to match it. Anybody know of one? It must be really expensive. There are a few options you can do, one is the 26650 LiFePO4 that can spit out 50+A each, so when you put it in parallel say 5P thats 250A!!!
Other than that, the only other issue has been drive chain breaking, predictable due to motor strength. Getting a stronger one speed KMC BMX chain to fix this. OK this is why I am responding, you are saying the BMX chains are stronger generally speaking?
These guys did a pretty good review on the kit. They're right, it is not easy to put in but it's worth it IMHO.
https://electricbike-blog.com/2016/01/12/cyclone-3000w-mid-drive-if-youre-gonna-build-something-this-illegal-then-it-better-be-able-to-outrun-the-cops/