I had a yk31c fail in full throttle mode but I just rode it home heavy on the breaks lucky I swap the drum out and add a front break or I'd been stuffed.
I sold my old razor with the my1020 and the guy drove it down the road with cars and got hit off he had a compound fracture of his leg and it looked like bbq spare ribs everywhere, a small slow scooter is dangerous when u got cars around you overtaking all time, it's like having a lamb running round in the bull ring just no hope. So I always play safe and avoid the roads completely if I can, that's why I liked my brushless scooter because it done 48mph if I did go on road it would only be a short distant rural in a 30 zone so It had no issues keeping up with flow i could even keep the white van man away from the rear.
I done that build for under £400 all in so maybe try find a second hand 48v 1600w scooter for cheap and put your Lipo in there with a cheap 48-72v 1500w sunwin controller they pump out 3.4kw on high stock, solder the stunt up just a smidgine and its kicking out 4.4kw and then I got 48mph.
I've heard from my motor seller now so you could order a hub it's cost me £180 to the UK and I'm gonna run it with a flipsky 6.6 vesc at 12s that's another £135 plus batterys but I got them already they cost me £240 for 6× 4s 10000mah graphene black cells they are not that energy dense the multistar packs are smaller and cheaper but the discharge current is lacking specially in colder weather and they max out at 60amps the graphenes do 150amps and I've done 65amp for a full discharge with no heating issues at all but really I'd say 18650 route is the best for density and safety but not so much cost.