ok i just raced last friday night. i had one size bigger on front than stock. i just put my 2-1 carb kit on the day before and it wasnt jetted right but i lost a lot of top end. i orderd 2 sizes bigger front today and im gonna see how its going to do. my best time with the 2-1 kit was 8.41, with my stock carbs i ran 8.30, any predictions on what i will run with my carbs jetted right and 2 sizes bigger front sproket. thanks Matt