This is about the continuing effort to get my '99 Whizzer to run. So far, it has a GY6 piston and the timing notched up one tooth. The carb that was on it was a PZ19. It would start but wouldn't rev up. I tried a new PZ19 and various jets and moving the center tapered jet up and down. Not much better. I now have a PZ20 with whatever jets it came with. Once I moved the tapered jet to its highest position, it will run on the stand but not rev to much past 1/2 throttle. Sometimes, I can finesse the throttle and it will rev up but when I try to ride it, it craps out with no power. It seems like its not getting enough fuel but...the plug was black today, after I tried running it again. It always starts on the first revolution of the pedals and will idle nicely. I have a new NGK BP6S plug at .025 gap. I'm kinda running out of ideas...At least I've figured out the crankcase pressure issue and its not blowing oil out like it was...