Hi I just built my first motorized bike I feal like I am 10 again [2 weeks and 400 k]. I had a heart attack 5 years ago ant have not ridden much since then [except for on the stationary].now I am comuting 14 k a day to and from work with 2 big hills that I know that I would have never made without my little china girl [like the name heard it here]. I also find my self going for rides just for the **** of it. I am useing a power king 80 and am quite pleased with it.A little rubber for sound profing a few mods high energy ignition and plug[thanks to this page] high flow exaust and intake matched ports and a home made expantion chamber and muffler[pulls real good]. stuff learned from My Dad [God rest his soul] and a few years of raceing 2 stroke carts back in the late 60s. My old lady is a little jealous of the new girl in my life. I just can not wait to build my next!