72" yak new to setting up 3d. need advice.

[yakyakyak]

Hey fellow Rc. addicts.
I have been flying for a good 10 years. unfortionately i have only been flying my dads planes, or my electrics. Now i have finally been lucky enough to buy my first large yak.. well heres the deal. i bought it from a friend who only knows it's from china..(yes yes i know, but i am not financially endowed) it has a os 120ax and weighs 11 lbs.. is this bad. next, can i run 30% in the 120.. the fuel has 24% lubrication. i need technical expertise on set ups cg, tunning the engine , and whether the engine is even good enough..
but lastly i just want to say three days ago i got to do my first hover with it.
being that the last plane i hovered was a small electric, i do belive i am hooked beyond any medication or hospitalization... i'm a addict and the only cure is more cow bell.. oh yeah and a bigger plane..

[rede2fly]

sorry nobodys answered this. ok here we go. its more than likly a china model product yak. is it yellow and purple with a fiberglass fuse?? if so its a little on the heavy side so yes a bigger motor is needed the 120 should work. and yes you can run 30% nitro in that motor but,, and this is a big but, you will take the bearings out sooner than normal. also you will have to open the high needle around 5 turns out. ask me how i know this . i used coolpower 30% heli blend. i got apx 2 years on the bearings. as for the cg take it as far back as the instructions say. if you dont have them then let me know and ill look at the one i have in the shop. i keep every instruction manule on every plane that i have built or make a copy before selling. hope this helps a little. and welcome

[VooDoo Child]

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[yakyakyak]

thanks i'll take some pictures of the model and post em..the cg is a little forward

i also found a huge piece of my puzzle.. after my maiden, underpowered flight I noticed some smoke from cowl..not good.... but the cause was very simple,
i was missing a head bolt... wow. so i got a new bolt and i'll try again.
should i worry about the engine it was run for about two minutes...
.