Grab some marvel mystery oil and lucas Fuel system treatment too if you can find it, Superlube grease with PTFE, Fel-pro gasket material (Comes in a big grey sheet) and a dremel tool with high speed steel cutter if you don't already have one.
I picked up a shimano trigger shifter to actuate the clutch, it actually gives More overall pull than the stock lever, and frees up that area for your original brake lever.
Amazon.com: Shimano Acera SL-M310 Rapid Fire Shifter, Left (Black, 3-Speed ): Sports & Outdoors
Besides that, it's all how you tune the thing. The marvel and lucas can be added right on top of the standard 2 stroke mix, though I mix around 32:1 or less and add an ounce or two of both to 2 gallons of gas. Plus, I run a decent synthetic oil.