I have the 750 AND the 600. the 600 is good on the 350, but the 750(i had to change the rods a tad leaner for cruise, 2 stages richer on primary jets, and 8 leaner on secondary jets, as well as lighter vacuum springs), it idles well, part throttle and cruises well, and WOT is W00T! But if you want a good all-around you won't really have to mess with, go with the 600. btw, did I mention I lightened the secondary butterfly too?
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