I found this weekend my engine seemed to be tuned well and as the weather changed I got a lean bog once again, engine would take off cold and be ok, then it would feel hot on the track. but I'd bring it in and it would temp at 190. So I heard to try a novarossi carb so I did for a qualifier. Put a quick rich tune both bottom and top. Night and day difference, it was WAY better. Had good bottom and top end, temped out about 210 after 6 minutes of hard racing.

Is there something wrong with a run of GO carbs???