i have a 2012 hdx prowler that starts perfect, idles perfect, and goes fast perfect but if i am running at about 10 mph it spits and sputters pretty bad. lately it seems all the rides we been going on is slow rides and been going slow in the yard doing yard work. could it be i just need to take it out for about 5 or 6 miles and hold it wide open or is something else going on here?

 

Maybe carb needs adjustment.

 

Is this an EFI model?

 

i am still having this problem, i changed oil, plug, battery and it still sputters on low end. it is the efi model and it is annoying because 90 percent of my driving with this thing is low speed. i can take it out and run the heck out of it and it still won't make a difference.

edit: also i check the tps and the line was right in the middle.