i have a 2005 400m. i have a pipe, jet, snorkel, K&N, and turnin 26x12 outlaws. what is some of the BEST internal engine mods i can get for my bike to get more low end power. dont care if it only goes 20 mph if i can turn a 44 inch bogger (just a figure of speech) just want low end torque. i know it will have to be a custom mod but does anyone know where i can get some.