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The sliders seem to have a little less stiction(high tech lube impregnated plastic) than the rollers so they have a more dynamic response. The are much less prone to developing flat spots and ridges than the round rollers also so they maintain their maximum dimension better to retain all of there original pulley deflection for top speed. And the top speed is increased slightly with them as they are shaped to slide out slightly father than the rollers. I was disappointed to find that my weighted hill climb speed (270 pounds of rider and ballast vs a steep steady 7% two mile hill) stayed the same even though the rpm was higher. I could add 1 gram of mass to each one to bring the pulling rpm back down a bit but it pulls at 7,800 rpm now which is not outrageous. And the weights are still fully deflected by the time I reach 50 mph so my economy above that speed will be unchanged. Over all fuel economy is actually up a couple percent this year for some reason so I have no real reason to open the drive train up again at this point. I will spend some time on it eventually to try to trim out the last few mph of top speed out of the front pulley travel but have to focus my spare time on aero mods to the CBR250R right now. If not for the fact that I bought the PCX for my son to commute on, I would definitely be building a tail for it as well which could add another 15%? of fuel economy versus running the Givi trunk that I have on it now.
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