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2012 400 YardSport in Reverse


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    • By Will Sutton
      I've got a 2023 UT400 (bought from tractor supply) and I've been beating my head against a wall with it.
      It will start and idle perfectly. The second I touch the throttle it sputters and dies.
      I've checked that the fuel pump is working  (it is).
      I've replaced the injector, throttle position sensor, O2 sensor, and intake air sensor. All with no change.
       
      I've just taken a look a the schematic, and there is a crank position sensor as well.

      Could this be the source of my troubles? If so, where is this thing located? I can't seem to find it on any drawings from the parts suppliers.
    • By redneckred
      I have a 2012 Bennche Bighorn 700X.  I bought it used.  It had been sitting in a field for several years untouched.  I put a new sun gear in the shifter, new shifter linkage due to the old one having been patched, and a new battery (and of course fresh fuel).  The machine cranked and ran beautifully.  I had it over a year and then the machine quit running.  As it would not stay cranked, I narrowed the problem down to a bad IAC valve.  I replaced it and it ran as good as new/old.  Fast forward, the machine started to act like reverse wasn't catching and would not always back up when in gear.  Then forward quit.  I assumed a bad CVT belt and got one.  Started removing the bolts from the cover and (3) just turn in the housing without coming loose.  (2) are on the bottom, so very little room to do anything with them.  I tried cranking the machine again to see the belt move since I can move the cover enough to see the belt and now the machine will not crank.  It turns over fine.  It gets gas to the injector and has spark.  I can spray cleaner down her throat and she would run until it ran out.  I have replaced the IAC twice and put a new injector with no change.  I went out and put the old injector back in to see if that made any difference and, well, it did.  I tried to crank the machine and the starter is stuck trying to turn the machine over even with the key off.  I have to disconnect the battery to stop it.  Before I shoot this thing, what am I missing?  Is this an ECM problem or something else I am not seeing?  Been dealing with these Gremlins for over a month now and weeds are starting to overtake the motor due to it not moving.  I would love to get the thing running first and any ideas of getting those CVT cover bolts out would be extremely helpful.  Thanks in advance.
    • By TPlummer
      Any ideas on using sound deafening mats? Have they helped with the noise? Worth it? These side by sides are so loud! 
    • By Brett
      Fuel injected 700 starts great and idles great but touch the gas and it dies
    • By dman66
      My buddy has a ut400 that the forward gear keeps popping out of gear. She only has like 400 miles on the odometer .the shift cable has been adjusted and the shift lever has been updated / modified. All other gears are good. Is there an internal detent cam or something that wears out or shift fork that can be replaced ? Or is there some other magic that I can perform ? Looks like the engine needs to be split.
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