There marked,I find the spec's are rich on the jetting page,its a good place to start though,better start rich than lean.Start leaning it out one thing at a time,like the clip. If its still rich below WFO try a leaner pilot ect,it takes time and trial and error to get it right so take notes on how it runs with the best jetting for the the time of the year(if you run pump gas its differnt for winter/summer)weather(humidity/temp/altitude)so you can go back to what works when you rejet for summer,differnt altitude ect.