Try different carburetor jets and maybe switch back to the NT carburetor instead of the HP ones. Even though the HP is for High Performance, I have always gotten better performance with the NT carbs. With a properly tuned expansion chamber exhaust I got my bike up to 41mph.
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Try different carburetor jets and maybe switch back to the NT carburetor instead of the HP ones. Even though the HP is for High Performance, I have always gotten better performance with the NT carbs. With a properly tuned expansion chamber exhaust I got my bike up to 41mph.