Aerox pulls to hard at low revs

Ive put 70cc kit, 19mm carb with 4.5g rollers and stage 6 rep exhaust on my bike and it does like 65-70 mph but when i first rstart revinv it it goe nowheee but then set off to savage for my liking specially on hills. Ive still got to put a malrossi belt on and a stage 6 variator with 4.9g rollers (couldnt get variator bolt off) would that make a differance or do i need summart else

 

softer clutch springs, the little ones not the torsion spring.

 

What will that do ? just learning mate ive also got stage6 medium torsion spring should i leave that off then?

 

allows the clutch slippers to throw out sooner, grabbing the bell at lower revs

 

Will it just scream at me at lower rev or will it be less agressive at low rpm

 

I'll refer to my post above, it grabs the bell earlier