i broke into my 06 z50 and removed 3 rollers like thread said, and i found no spacer, but now it runs real good , for about 30 sec. then lugs down picks back up then lugs again, and has trouble startin without hold in throttle, and will die if you dont keep it pushed when it lugs....it didnt do this before i took the rollers out, anyone please help....did achieve 18 mph without cdi..its comin

 

Clean the carb.