Right i am just put exhaust on and jetted it etc...

Right but i have to change oil ratio from stock 20:1 to 32:1 but i wondered if am able to do it this way without messing about with block off kit?

for the extra 12:1 ratio of oil i shud have in the fuel when it is mixed ,am i able to put the 12:1 oil in the fuel tank with the petrol (gas) itself so then the petrol as the extra 12:1 and the oil injectors puts the 20:1 in?

Is this possible?

i know its a lot of messing but its less messing with block off kit

 

id just get the block off kit anyway, and mix the whole bit by hand. the injectors as i have heard from my blaster riding brothers that they clog easy and sometimes "forget" to inject the oil, i have watched many of my friends have to load up early because they toasted their motors from lack of 2 stoke oil.