Hello everyone ..Power I need you now!!!

[demidestructo]

I want to build lifan 150cc vertical motor in to as much power as possible . I wante to know how far i could go 250cc bore or 200cc .i thought only 200cc cause the case would not fit. I was going to 200cc and buy 200cc head and get it port matched ,polish and smooth ridges deck the head by .02 and 5 angle valve job. would a 250cc head fit and flow more? I was thinking of fuel injection but a nibbi carb would let me spend more on engine.So what do you think ? I was thinking of tryng to build a clone powroll 218 stroker do anyone know what those are i heard thats the engine to get. My bike is xr200 clone and I been swapping aluminium parts from a cr500 like swingarm and rear tunable showa shock with reservoir. I'm fitting those with setting the swingarm pitch at 5' and bike is 52" wheelbase . Im trying for the power to weight ratio of a 5-6000 dollar bike for a 1000. Im tossing things all around from turbo fuel injection to stroker . I'm building my dual sport in to a supermoto ,I already got 17 aluminium rim for the front and street tires and 44 tooth rear sprocket for a final ratio of 2.58 . the bike weighs 243 stock I'm cutting off rear pegs and as much heavy steel as possible. i have a friend who is custom metal fab guy who is making me aluminium parts ,to lighten it up. I would like to see how light I can go.I have noo wife,kids or real bills and three jobs . So I would like to do as good of a job as I can. Ok sorry I been trying to get in here for a while now . What do you guys think?