so i have an 84 z50 and i rode it all last summer with no major problems and this summer it wont start at all. I sprayed some starting fluid in the carb and it wants to start so bad and rarely it does get spark and start up but then just shuts right off. i have cleaned out the carb numerous times and i just dont even know what the problem is anymore. Im pretty sure it gets spark, it gets fuel and it gets air. Does anybody know what the problem could be? i was thinking shoul i just get another keihin replacement carb from TB and see if that does the trick?