Tricky

I know I am late to the party but, am I wrong to assume the pursuit for more power was fruitless? I have been fighting mine for a while. It runs now but will lose power and die. Then will restart without issue. I am waiting on my second plug wire as this latest one has cracks and will arc to the frame or motor. If this does not do the trick I think I may just replace the coil as it acts like my old Ford did when the coil was failing. I do wish there were upgrades for more reliable operation. Short of a turbo or NOX I doubt more power is capable. I am sure someone out there has dropped a whole new power plant in to one but I have not seen that yet lol

I truly dislike the way we are almost forced to do troubleshooting by parts swapping these days. However, I was thinking of getting a new computer as well. I am sure amazon sells them but as with as with all things it can be a bit iffy. I will check eBay as well. It would sure be nice if TS had planned ahead and made sure there were qualified repair shops before they began selling these. Have you tried the PC software HUD ECU HACKER DOWNLOAD ?I followed the excellent instructions from aefron88 and was able to view the codes. Honestly I am not able to make heads or tails of it other than to see that everything appears to be working fine as best as I can tell. It goes without saying I need to buy a manual for it rather than guessing if things are within tolerances. I have two of these UTV's mine is not usable and my wife's is beginning to have problems which is beginning to elevate the priority level of figuring these things out On mine I adjusted the valves replaced the spark plug, several new fuel filters, cleaned the air filter, cleaned the O2 sensor and MAF. I replaced my plug wire as well. I then did the ECU reset procedure. I saw where some one had theirs jump timing and and now needs a new motor. I think I will find the timing chain tensioner procedure next and while there check compression. Gone are the days of slapping a new carburetor on news points plug and condenser and calling it good. Things are finally cooling off in Florida so I guess it will soon be time to stick it back in the shop and really dig in to this thing. If I find the magic cure I will post the results and try my best to sound like I know what I am doing LOL

I think we are in the same boat. I have not replaced all the components you have I have been attempting to trouble shoot it with the computer. So far all systems look good but I still have the same issue. I pulled the plug again and it looks fine. In the past a fresh fuel filter would make things improve. But that has not been the case this time. I hope you figure it out and if you do please let us know your findings.