I was reading the carb specs posted, The most important thing missed out was the float height - it should be 21.5mm from the base of carb to the float when its inverted but just touching the needle - not pressing it.
Once you have your float height set, and using a 17.5 pilot (slow) jet with 2+1/4 turns out of the idle air bleed screw, you would have good control till 1/8 throttle,
The rest was perfect with 2nd step from the top of the needle and using a 150 jet on the main.
Be absolutely sure your air passage for your main needle holder are clean - if not you will have gulps of fuel at higher revs and may bog down..
You may also want to look into adjusting your reed valves first - they should be 9mm from the tip to stop. This is what dictates engine torque. (be sure you use threadlock on the screws as they can come loose while the engine is running - destroying your engine)