kymco super 8 50cc new 80 kit

[fraserdredude]

ok heres the thing. i nearly have enough money to buy a new 80cc kit for my bike. this is the kit http://www.adrenalin-pedstop.co.uk/p/AIRSAL-80cc-CYLINDER-KIT-FOR-C-1916.aspx

on the description it says no upjetting or modifications needed, one of my experienced friends who is fitting it says that you probably wont need to upjet but it would help. another inexperienced friend says you definately need to otherwise it could burn the piston. who is right?? and if i do need to upjet could anyone please advise me on the jets to buy?? thankyou.