I have a baja doodlebug and I plan on swapping a predator 212 with a torque converter and removed governer. Would a 60 tooth rear sprocket and 12 tooth front sprocket have a good gear ratio? I plan on riding it on small hills, and I'm a heavier rider so would it need a lower gearing? Is a top speed somewhere around 30 obtainable. I am new to modding minibikes so any help is appreciated.