Not bad. We got 59 mph on the road with just a JBS sheave, no cdi box.
with the right setup you can have bothawesome! in 6 months I want to do something clutch wise. need to study up. however my mods will be to improve crawling ability with 28s over the rocks and up canyons. I would like an increase to 60 mph which I feel is just right for a top speed on gravel roads.