Probably comparing apples to oranges, but the 70cc on my zx50 made a very nice improvement! It didn't make leaps and bounds on top speed, but the the increase in power is significant! Right now I'm getting about 52mph top speed, but I get there ridiculously fast! It is also not even phased by hills or headwinds. It is also nice being able to ride around at 1/2 -3/4 throttle and know I still have more there to get quickly out harms way, especially with all of the idiot drivers around here! I think with some further tuning I can get more out of the top end, I'm just tired of messing with it for right now.
