Evercross Ev65m

[Radek]

Hi, new here and new to EScooters.
Skip this lenghty first part if your in a hurry:

There are these cheap chinese e-dirtbikes for kids on amazon, I’m sure you’re aware. And I have a 4-year old kid that deserved spoiling so bought him this Evercross Ev12m mini pitbike. 300 watt motor, 36V 4Ah battery. Expected a chinese joke but after fixing the grinding brakes… This little thing is awesome! Peppy, long run-time and takes a beating. Also my other kid, a 9-year old that obviously is too big for such a small bike absolutely fell in love with it. Jumping and mishandling it way above what it was made for. Still holding up!

With strengthened confidence in this chinese Evercross brand and the 9-year old not tiring of this thing. I checked Evercross website and there found the larger version Evercross Ev65m. 800w instead of 300w, still 36v but battery capacity upgraded to 7.8Ah from 4Ah. So bought it and up-on receiving I’m once again surprised by the quality. While suspension, geometry and brakes are clearly toy-grade the overall feeI of the frame, seat, plastics and so on feels almost premium! I’ve ridden 100cc+ pit-bikes that felt more flimsy. Checked brakes, wheels spin freely, bearings ok, tire pressure also. All seems ok so let’s try it.

Result: The 300watt evercross is slightly faster than the 800watt bigger one.

Now for the actual question:
Why is a 36v 300watt 4Ah toy bike, faster, stronger and lasts significantly longer than a 36v 7.8Ah and by manufaturer rated 800watt dito?

Here’s a youtube we recorded for evercross.

There’s only a 10 kilo difference between these kids. The older kid is 29kg. 35 with gear? Both bikes fully charged and there’s really nothing dragging or binding on the larger bike. Perhaps slightly tight chain-play but don’t want to loosen too much due to chain lash.

By hand, feeling the motor of the bigger bike after 60 minutes of driving I’d estime the motorcase to around 40-45 celsius. That should be ok. Could there be some kind of limiter on this thing? That artificially limits those 800watts to something EU-legal and it ends up being slower than the 300watt thing that doesn’t need one? My best theory right now as other than a lack of power there just doesn’t seem to be anything wrong.

I’m awaiting evercross support answer on warranty actions so haven’t opened up the bike to examine internals. But once warranty claims are settled I’ll probably be doing some upgrading and will update this thread.

Would love to hear from anyone else here with experience from these evercross kids-toys?

Cheers
Radek J

 

[Ibst]

I've also been planning on buying one of these but it does seem slow for 800w, i did see a youtube video where they disconnected a wire inside of the battery case and it ran faster. Heres the link

would be interested to know how fast it runs after you've disconnected it

 

[Radek]

Ibst​

Glad I came back and noticed your post! So far, apart from the lack of power, I recommend it.

It's simple but well thought out. My kid is trashing and jumping it and so far no bends, cracks or broken parts (which I expected). To be honest I'm surprised it's holding up so well from that jumping as the front&rear suspension has no damping, only springs. Tires are pretty good too. Massive knobs with good grip on dirt and grass. I believe it was designed for plenty more wattage. The overall weight, the rigid frame and even a t8f chain, on something this mild, tells me so.

I've tried gearing it down now, quite a lot. Slightly quicker acceleration, especially with a heavy me on it. But still slow overall. The video you found though.. will try this tonight! see what it does and report back.

Plan B is another 36v battery in series and a china 3000watt 72v motorkit. As the mounting plates on those are a direct swap.

 

[Radek]

Breaking that blue circuit going in&out of the controller did nothing for overall acceleration or speed.

As I haven’t opened this up previously, I now see there’s room for both another battery and a larger controller. The stock controller is marked rated for a meager 17A. At fully charged 36v that’s 612watts, not 800watt as advertised. Though the stock motor does have a sticker saying 800watts max.

I’m ordering that 3000 watt kit.