Carb tuning class 101, start rich, work down. The polaris jetting chart is rumored to be 2 sizes to rich, so your always safe following the chart. I always jetted 1 size lower than the chart, -10 to 10 or 20 + in the winter. In the spring I would change to warmer settings. There are other factors involved, so make sure every thing else is set correctly. I agree with the previos statement, 'the pto gets the larger jet'. Do you have the shop manual? Also you should get a clutch alignement tool. We made our own by tracing my polaris dealers on some stainless plate. Ole' Earlandson wrote many books on these subjects, tuning is not easy, and there is alot to it. Have fun! Quote of the day. Law of Logical Argument - Anything is possible if you don't know what you are talking about.