ORIGINAL: j_blaze
alright, dropped in te new motor yesterday and its a screamer, makes my S5 look like a sport motor. i noticed though the bottoms of the c-hubs, where the mud guard connects to the bottom of the c-hub, is cracked on both sides. not sure if its from the mods i've done, ie. cut out the backs. so i threw in a set of aluminum cen c-hubs and with a little trimming they fit perfect, the hobao cvd's were rubbing on the c-hub a bit. i'll test it out today if it ever stops raining.
LOL ! Now do you see why I called the S5 a Sport motor when compared to the Picco .21 ? That ZX-21 is identical to my favored JPX 21/Picco P7R/Drake .21........ I got alot of flack because I said exactly what you are now saying when comparing these engines....
the scary thing with the Picco 21 is that it will take 2 gallons for its real top end to start showing, these motors take quite some time to loosen up and start making big HP... I advise you to run a 086 pipe on that motor, as well be prepared to have to seal the carb body as in my Picco thread...