Are any of these knock off ones good?

[NinetySix]

to be honest those bikes look pretty average for china bikes

i dont think much of the aftermarket stuff fits the china bikes... could be wrong tho

probably better to buy a slightly better pit bike to begin with than to buy the cheapest one you can and then modify it

 

[cass38a]

Man if those prices are in USD i am glad I live in Australia, I can get freight for $150 aussi dollars for 1000 klms. The price for the bike seems fair compared to aussie prices. That particular engine looks like a base model Lifan with the clutch on the crank. If you can find a start in any gear model (the clutch goes in the top of the case not the front) it is eaiser to hot up to get a few more ponies. Also a all up gear pattern is probably a bit better but you will probably need to find another 150 to 250USD to get these features.

The rest of the bike looks pretty sweet, a bit like a MSOx6r.