Moved and courtesy bump! Welcome to BGW!
This is interesting... I googled Youngsoo Maxcar, and it seems that your the only person with one!
and it seems that you've asked about your cart on pretty much every golf car forum with little, to no help for about a year now!
I, personally have never heard of Maxcars before... hopefully someone else has! (It appears to be a Hyundai spin-off)
I'm sure you've seen this article/link before, but I'm posting it for the rest of the BGW community!
http://www.golfcarcatalog.com/golf-cart-blog/maxcar/
Good luck!