well, your best bet would be a 79cc predator bike kit, since that uses go-kart parts, but at a 400$ price tag its going to cost you.
you could also get a higher-end 66cc bike kit, (pk 80, zeda 80 etc), I've had great luck with those 99$ 1 piece jug kits as well after i replaced the hardware with real bolts instead of pot metal.
all depends on what $$$ you got burning a hole in your wallet.
id go with any older name brand MTB bike to modify, (ie diamondback, giant, trek, merlin, etc.)
you could also get a higher-end 66cc bike kit, (pk 80, zeda 80 etc), I've had great luck with those 99$ 1 piece jug kits as well after i replaced the hardware with real bolts instead of pot metal.
all depends on what $$$ you got burning a hole in your wallet.
id go with any older name brand MTB bike to modify, (ie diamondback, giant, trek, merlin, etc.)