Does anybody have information on the Ican EO4? I am wondering which frame this is and what are the geometry specifics? Also, will it handle a larger battery than the stock 450WH battery? Looks interesting otherwise. Maybe something like the Light Carbon Ebike?

I wonder if the frame supports the Bafang M820 motor?

Looks like the Carbonda FM909 to me. I have that frame and will be building it this winter. Looks good built up.

https://www.aliexpress.us/item/3256804691853177.html?spm=a2g0o.cart.0.0.78c938daeFRbxj&mp=1&gatewayAdapt=glo2usa&_randl_shipto=US

Are you saying it is the chainstays flexing? Or the shock linkage? I don't know why shock linkage would be a problem. Also what size FM1002 frame. And how big a rider are you? Does flex cause the bike to shimmy at high speeds? Or the tire to hit the sides of the stays?  I am on a medium, and I don't notice abnormal flex. Bummer. Now I am going to get anal and fixate on this with my recent fm1002 build when I ride it.

What are peoples opinions of Bafang motors? What advantages / disadvantages  are there for the 510. And what advantages/ disadvantages for the 600?

"This is not a bike for un-groomed snow, wide tires, or a do-it-all kind of rig" Hmm. Mine came with 90mm rims and Maxxis DHF,R 4.8" tires. They fit the bike just fine. And 29" x 3.0 for the summer is a blast. Definitely a monster truck. But fun to ride.

BTW, I run a Slack-R headset modifier.

. . .  I discovered the VMG Typhon. The Typhon is by far the best option for a frame only build. It's a little bit more expensive and they're based out of Australia.  It uses a bafang motor and the geometry is very modern.

Edit: the Typhon is a mullet design. 29er front 27.5 rear.

Did you wind up getting the Typhon? If so, any thoughts?