Honda Dirt Bikes Forum

Hello I recently acquired a 90 xr80r.  It ran rough when I got it so I did some basic maintenance.  I changed air filter and the spark plug along with cleaning the carbs thoroughly .  The slow jet was clogged causing the rough running.  After getting the  cleaned carbs put together the bike will start, sometimes, then cough and die. I am guessing that the idle speed and or mixture screws are the culprits.  I have tried fiddling with them with no luck.  Does anybody know  what the stock positioning of these are, or what else may be wrong?  Thanks for your time.