I have a 1998 ts770l I am having to use the choke to allow the ski to run at top speed if you try without the choke it stalls. What are the carb highspeed turn settings? I rebuilt the carb of the ski I just purchased “non running” the jets were all the way in so I left them like that.Sorry for my lack of comprehension,sounds more like the high speed mixture screw on carb(s) as issue. I have manual w/ settings if you need screw turn settings. Just depends on what motor were dealing with.