So why not just go back to stock with B2 setting?

i do a lot of trail/ mud hole diving ; just wanted ther extra hight in tire size for rocks and logs ect, , want a bigger lift but as of now they do not have anythging bigger than a 2 inch lift , i could go with some bracketts i made for shock but that puts me in a binding position with no travel left on my shock , long story short , i like the 28 big horns on my moto , but they have slowed my take off and top end , just want to get settings right as to not kill my moto in the and to try to get that power back my moto had from stock with the 26 inch tires any help would be great , i have clutch out and had already set at B2 setting , but now i read about C1 setting , not sure witch setting to go with , i do want power from start and through the whole power band like factory , or as much as i can ,