aaah another aussie? thats 3 new ones this week, im glad you joined,
a lot of people are scared of mods to there engines for obvious reasons, but raly these chinese pieces of junk need a bit of xtra punch, you will see when you first ride it
a few easy and cheap things you can do to help:
buy a cheapo poocketbike pipe from ebay cut the expansion chamber offa it and weld it on ur bike.
match the intake and exhaust but i have no clue how to do that but someone else will tell
take out that spark plug you got wif your kit smash it with a hammer if you want to or put it in the bin find an ngk spark plug for it
changing the plug wire may also help