im running the Offy with dual 600 demons for clearance. even had to put 1" risers to make the seal on the RA pan. Like GeeTee says it gives you all the power youll ever need on the street. it takes a minute to get the carbs right and the sequence bar adjusted. Also learn to not just floor the pedal, the single stage tends to like to be eased into not to say it wont still shred a tire without brake from a 20 roll. with that said and the carbs right it accelerates like a 500hp sewing machine, carbs coming on between the shift in sequence, and pulls like an elephant all the way through up and past 100, torque at hand is a wonderful thing.